A number can be accurate while the sentence around it is wrong
A school report says that a library is quieter after new panels were fitted. It gives a price, two timing readings, several comments from students and a recommendation to expand the project. Every sentence appears plausible. The English comprehension problem, however, is not simply to decide whether we like the proposal. It is to separate what was observed, what was calculated under an assumption, what the writer believes and what the evidence can support.
That distinction is one of the most transferable reading skills in secondary school. We meet it in advertisements, information pages, news reports, speeches, diagrams, scientific explanations and policy proposals. We also meet it when someone uses an accurate number to persuade us of something the number does not prove. Strong comprehension answers respect the source without being controlled by its confident tone.
This chapter follows the integrated evidence audit in Volume 0308 but owns a distinct English examination skill. The earlier guide asks which school panel package could be recommended under cost and area constraints. Here we practise a close, defensible reading of a non-narrative passage: identifying the status of each sentence, interpreting qualifications, using relevant evidence in short answers and selecting the right ideas when summarising. The goal is precision, not suspicion for its own sake.
Find the current SEC English requirement before following an examination tip
The first Singapore-Cambridge Secondary Education Certificate examinations are in 2027. The current SEAB 2027 G3 syllabus index, updated 26 October 2026 identifies G3 English Language as K300, replacing the former 1184 code. The official K300 syllabus describes four assessed papers: Writing, Comprehension, Listening and Oral Communication. Paper 2 Comprehension is 1 hour 50 minutes, 50 marks and 35% of the subject result. Its Section C uses a non-narrative text and accounts for 25 marks, including summary writing of about 80 words.
The official paper does not ask candidates to complete a separate examination called ‘fact-checking’ or ‘EMS’. Our categorisation method is a practical way to answer actual comprehension questions clearly, especially when a text contains figures, conditions and persuasive claims. Some tasks ask you to retrieve an explicit detail; others require inference, vocabulary-in-context, language effect or a concise summary. Always respond to the actual command and marks rather than forcing the same formula onto every question.
Students who take G3 English as part of SEC should use the prescribed K300 syllabus and their teachers’ current materials. The fictional passages and worked responses below are original learning exercises. They are not copied from an official examination paper and are not predictions of a particular question.
Use five reading labels, but never mistake the labels for an answer
An observation is something reported as directly measured or seen, such as a return pulse arriving after 0.050 seconds. A calculation is a result derived from values and a model: an assumed wave speed of 340 metres per second and a round-trip path produce an inferred reflector distance of 8.5 metres. A claim is an assertion that may be supported, partially supported or unsupported; ‘the new room is silent’ is a much broader assertion. An interpretation says what the writer thinks the information means. A recommendation proposes an action, such as commissioning a controlled trial.
The five labels help organise reading, but English comprehension marks come from answering the question. If asked what the writer recommends, name the action and relevant condition. If asked why a figure does not prove the claim, identify the missing link. If asked for a word’s meaning, work from its use in the sentence, not from an unrelated dictionary sense. If asked to summarise specified content, select the correct points within the given scope and paraphrase where appropriate.
Read one original passage as a controlled source
Fictional source, paragraph one. The school library committee has received two offers for wall panels. Offer A consists of 18 panels and an installation charge, costing $984 in total. Offer B includes 24 panels at a quoted total of $1,016. The committee has set a limit of $1,000 and asked for at least 12 square metres of nominal panel face area. Both proposals meet the area requirement, but only Offer A meets the present budget.
Fictional source, paragraph two. A student group recorded two isolated returned sound pulses in the candidate rooms. In the simple model used for teaching, one pulse returned after 0.050 seconds and another after 0.060 seconds. At the assumed speed of 340 metres per second, the corresponding one-way reflecting-path estimates are 8.5 metres and 10.2 metres. The group cautioned that the timings describe paths and do not directly measure speech clarity or sound absorption.
Fictional source, paragraph three. Twenty-four volunteers visited the rooms; 18 said they preferred the first room for quiet individual reading. Their comments were encouraging, although the visits took place at different times of day. The committee therefore proposed a carefully controlled pilot before purchasing panels for other spaces. A supplier leaflet had described the materials as ‘transformative’, but the report did not adopt that promise because no comparable before-and-after acoustic results had been supplied.
The passage is short enough to read in one sitting yet rich enough to demonstrate almost every danger that appears in a persuasive information text. Its $984 and $1,016 quotations are source facts within the fictional scenario. Its 8.5 and 10.2 metre distances are mathematical estimates dependent on assumptions. The 18 out of 24 responses are a particular sample, not proof of all readers’ preferences. The proposed pilot is a recommendation, not an outcome that has already happened. Keeping these categories apart lets a candidate answer without inventing extra information.
Four passes through an unfamiliar non-narrative passage
On the first pass, identify the text’s purpose and the broad subject: the committee is considering a proposal, not reporting a proven acoustic breakthrough. On the second pass, mark quantities with their units, denominators and conditions. On the third pass, circle language that changes certainty: may, could, reported, estimated, under the assumption, before, after, subject to or not yet. On the fourth pass, match the precise question to the smallest amount of text that can support the answer.
For a direct retrieval question, concise content is usually more useful than commentary. For an inference question, show the link between the stated clue and the inferred meaning. For a language-effect question, discuss how the choice of expression influences the reader in this context. For a question about credibility, do not declare that every promotional sentence is automatically false: explain what the source says and what evidence would be needed to justify the strength of the assertion.
Summary writing is selection before compression
A summary of about 80 words cannot be a copy of the full passage with a few adjectives deleted. Work out exactly what the task asks you to summarise, identify discrete relevant content points and remove repetition. If the task concerns reasons for a pilot, the competing prices may matter because the budget is binding, and the incomplete evidence may matter because performance is unconfirmed. A detailed account of the student visit timetable may not be needed unless it explains a limitation in the specified scope.
Paraphrase for meaning. Do not replace every word mechanically: ‘inferred distance’ is not interchangeable with ‘measured sound reduction’. Preserve negatives, limits and the relationship between cause and proposed action. Count your words responsibly when the task asks for a short summary, but do not use an artificial shortening technique that loses key content or joins unrelated statements. The best short answers are complete because they select carefully.
Do not turn scepticism into over-reading
A fair reader does not treat a supplier as dishonest merely because a claim needs verification. Likewise, the reader cannot prove the committee’s pilot will fail. The text supports a narrower reading: the committee has enough information to compare the stated prices and decide what it wants to test, but not enough to guarantee a desired acoustic result. In English examination answers, being critical means testing what the passage licenses, not supplying extra accusations or personal opinions.
Forty worked reading decisions: from a direct detail to a defended interpretation
These original cases progress from finding stated figures to evaluating qualifications, inference, word meaning, authorial stance and summary selection. The worked decisions deliberately use the fictional passage. Practise saying exactly which source detail justifies your answer, then compare your wording with the model explanation.
1. Retrieve the actual decision
Question. Which package does the original passage identify as affordable?
Worked answer. The source identifies Offer A: its total quoted cost is $984, which is within the $1,000 cap. An answer naming B because its panels are individually cheaper would miss the total-price condition. The reader should report the actual source comparison rather than make a new recommendation about which product looks more impressive.
Reading check. Use the words ‘total quoted cost’ when they matter; a unit price and a project total are different quantities.
2. Retrieve the rejected cost
Question. How much was the other quoted package?
Worked answer. Offer B is quoted at $1,016 in total, so it exceeds the $1,000 limit by $16. The direct answer to ‘How much?’ is $1,016; the budget comparison is useful only if the question calls for it. Good reading avoids padding a simple retrieval response with speculation about why the supplier charges more.
Reading check. Underlining the exact value prevents swapping the two offers.
3. Notice the second requirement
Question. Does affordability alone satisfy the committee’s conditions?
Worked answer. No. The passage states a minimum of 12 square metres of nominal panel face area as well as the budget cap. Both offers meet the area requirement, but only A meets the cost requirement. A candidate who mentions only the cheaper price answers an incomplete version of the question. Read joining words such as ‘and’ closely.
Reading check. An answer with two conditions should normally address both.
4. Separate a price from a benefit
Question. Does the $984 quotation demonstrate that the room will be quieter?
Worked answer. No. The price establishes what Offer A costs as quoted, not the outcome of installing it. The passage explicitly says comparable before-and-after acoustic results were missing. A strong response connects the absence of relevant performance evidence to the inability to guarantee quietness, rather than merely saying ‘not enough data’ without explanation.
Reading check. Always name which kind of data is missing.
5. Identify an observation
Question. What did the student group report directly from its pulse recordings?
Worked answer. It reported returned pulses after 0.050 and 0.060 seconds. Those delays are the observations within the fictional passage. The subsequent distances are inferred from a mathematical model using an assumed speed. This distinction matters because a retrieval question about measurements should not be answered only with calculated metres.
Reading check. Write the unit ‘seconds’ to keep the reported values meaningful.
6. Identify a model
Question. Why are 8.5 m and 10.2 m described as estimates?
Worked answer. The distances depend on a simplified out-and-back reflection model and an assumed speed of 340 m/s. The figures are not direct measurements of how much sound a wall absorbs. The term ‘estimates’ signals a conditional interpretation. An answer should name the assumptions instead of treating the figures as arbitrary guesses or certain room dimensions.
Reading check. Match each numerical claim with the operation used to produce it.
7. Respect the denominator
Question. What proportion of the 24 volunteers preferred the first room?
Worked answer. Eighteen of twenty-four volunteers expressed that preference, equal to three quarters or 75%. The denominator is the volunteers in the stated visit group, not all students at the school or all possible library users. A full answer preserves who was counted and the relevant preference rather than claiming ‘75% of everyone’.
Reading check. Ask ‘75% of whom?’ whenever a percentage appears.
8. Identify a sampling limit
Question. What stops the volunteers’ preference from proving a universal result?
Worked answer. The group was small and volunteered to visit. The times of day also differed. These conditions limit how confidently the findings can be generalised to other users and comparable conditions. The answer need not accuse the students of dishonesty: the key is that one sample under changing circumstances cannot establish a universal preference.
Reading check. Distinguish limited scope from fabricated data.
9. Name the proposed action
Question. What does the committee propose after reading the report?
Worked answer. It proposes a carefully controlled pilot before purchasing panels for other spaces. The word ‘before’ is part of the action: testing comes ahead of expansion. Saying that the committee has already installed panels elsewhere changes a future recommendation into an accomplished fact. Correct comprehension preserves the text’s time sequence.
Reading check. Underline temporal markers rather than relying on a vague impression of progress.
10. Read a promotional adjective
Question. What effect might the word ‘transformative’ create in the supplier leaflet?
Worked answer. It suggests a dramatic positive change and encourages the reader to expect an unusually strong outcome. In context the report withholds that language because supporting comparative results are absent. The effect is persuasive optimism, not a precise acoustic measurement. An explanation of language effect needs both the chosen word and its likely influence here.
Reading check. Avoid the generic answer ‘it makes the reader interested’ when a more precise effect can be named.
11. Do not add a motive
Question. Does the report prove that the supplier intended to deceive the school?
Worked answer. No. The passage questions whether the leaflet’s sweeping promise is supported, but it does not establish the supplier’s intention. Inferring dishonesty would add a claim about motive not supplied by the text. A balanced answer says the language appears stronger than the available evidence without alleging a hidden purpose.
Reading check. A claim about someone else’s thoughts requires its own support.
12. Fact within a fictional source
Question. Can a quoted price be called a fact even though the whole exercise is invented?
Worked answer. Within a reading comprehension task, the passage states the price as a given detail; candidates use it to answer questions about that fictional scenario. Outside the exercise it is not a real-world commercial quotation. Strong readers distinguish the truth status of an invented case from the evidence status of a sentence inside that case.
Reading check. Respond to the question’s source world without presenting practice fiction as a public fact.
13. Different time, different inference
Question. Why does the phrase ‘different times of day’ matter?
Worked answer. It points to a potential difference in the conditions under which volunteers formed their opinions. Morning and afternoon occupancy or surrounding activity might vary. The passage does not prove that timing caused the preference, but the lack of control weakens a simple comparison. Explain the possible confounding condition, not a definite causal mechanism.
Reading check. Words denoting time can be central qualifications rather than background decoration.
14. Compare two types of certainty
Question. What is stronger in the source: ‘costs $984 as quoted’ or ‘will make all readers happier’?
Worked answer. The price is explicitly reported within the scenario, while a universal satisfaction claim would require future evidence and cannot be derived from the quotation. The source supports a specified cost comparison, not a guarantee about every person’s experience. The stronger conclusion is the narrower one tied to the stated quantity.
Reading check. Precision often comes from stating less, but supporting it fully.
15. Correct a swapped label
Question. A draft says that Offer B costs $984. What went wrong?
Worked answer. The labels have been exchanged: the passage assigns $984 to A and $1,016 to B. A well-written explanation can still be wrong if its basic attribution is mistaken. Revisit the relevant line, mark the offer names and numbers together, and repair the exact error without rewriting the entire response.
Reading check. Link each figure physically to its source noun when annotating.
16. What does ‘nominal’ protect?
Question. The writer refers to ‘nominal panel face area’ rather than guaranteed coverage. Why?
Worked answer. Nominal face area is the arithmetic size of the panels before considering installation constraints such as gaps or obstructions. The qualifier prevents the calculated area from being misread as verified useful coverage on every wall. A response should explain the limit in this context, rather than simply defining ‘nominal’ as ‘ordinary’.
Reading check. Choose a vocabulary meaning that fits the sentence’s logic.
17. Scope of the word ‘only’
Question. Interpret ‘only Offer A meets the present budget’.
Worked answer. The restriction concerns the two stated offers and the present $1,000 cap. It does not mean no other supplier in the world could meet that budget, nor that Offer B could never qualify under a changed price. A careful answer keeps ‘only’ within the comparison that the passage actually makes.
Reading check. Restrictive words can be true locally but false when expanded beyond their stated frame.
18. Preserve the word ‘present’
Question. Why not say Offer B is permanently unaffordable?
Worked answer. The report uses the ‘present budget’, meaning the limit in force for this decision. A revised limit or quotation could change affordability, although the passage does not say that such a revision has happened. The correct inference concerns the current condition, not an indefinite future impossibility.
Reading check. A time-limited condition should not become an absolute statement.
19. Observation versus opinion
Question. Compare the measured delay with volunteers’ preferences.
Worked answer. A timing instrument gives a reported interval; a survey answer describes a person’s expressed preference. Both may be useful, but they measure different things and carry different limitations. The passage never claims that preference is itself a precise sound-intensity reading. Good comprehension names the kind of evidence before judging its relevance.
Reading check. Do not turn a subjective response into an objective acoustic measurement.
20. Testing causation
Question. Would a preference survey prove that panels caused quieter conditions?
Worked answer. No. The source describes candidate rooms and reported preferences without a controlled before-and-after installation test. Attributing improvement to panels would invent an intervention and a causal comparison. A strong explanation notes that changes must be attributable to the tested condition, not merely associated with a preferred room.
Reading check. Look for a defined intervention, comparison and outcome when evaluating causal language.
21. Write an inference with a clue
Question. Why does the committee favour a pilot over immediate expansion?
Worked answer. The committee has a feasible quoted option but lacks comparable acoustic performance evidence. It therefore wants to test the result before committing more widely. This inference connects the report’s evidence gap with the proposed sequence of actions. The answer should not add that the committee fears financial ruin or dislikes the supplier.
Reading check. A useful inference bridges two stated facts using a modest, defensible step.
22. Retrieve the purpose
Question. What is the report mainly trying to help the committee do?
Worked answer. It helps the committee evaluate a panel proposal against cost, area and evidence requirements before deciding on further action. The purpose is practical decision support, not entertainment or a general textbook lesson about sound waves. The answer draws on the passage as a whole rather than treating a technical detail as the main topic.
Reading check. Main-purpose questions require the whole text’s direction, not the first statistic encountered.
23. Explain the contrast
Question. Why does the text move from encouraging comments to caution?
Worked answer. It acknowledges positive volunteer feedback and then introduces a limitation: the visits were not held under consistent conditions and no comparable acoustic test was provided. The contrast demonstrates balanced judgement rather than dismissing the volunteers. A language-effect answer should identify how the concession makes the conclusion more credible.
Reading check. Look for ‘although’, ‘but’ and ‘however’ to locate the writer’s turn.
24. Avoid an absolute paraphrase
Question. Can ‘many readers preferred the room’ be rewritten as ‘every reader was satisfied’?
Worked answer. No. The source gives 18 preferences among 24 volunteers, not a universal statement, and preference for reading does not measure total satisfaction. The proposed paraphrase changes both quantity and meaning. In comprehension, apparently small changes in quantifiers can destroy the accuracy of a response.
Reading check. Preserve ‘some’, ‘most’, ‘all’ and ‘none’ exactly where they carry meaning.
25. Difference is not a trend
Question. Can two room-delay readings prove sound performance is improving over time?
Worked answer. No. They describe different rooms in a simple model, not a time series measuring the same room before and after an intervention. Calling them a trend would introduce a new dimension—change over time—that is absent from the source. The right answer points out the mismatch between the comparison offered and the trend claimed.
Reading check. Before describing a trend, locate the chronological observations.
26. Disentangle accuracy and relevance
Question. A pupil correctly calculates 10.2 m. Does that settle the panel decision?
Worked answer. It shows the arithmetic for a reflected-path estimate under the model. The committee’s desired outcome is a better reading environment, for which the text lacks the appropriate comparative performance measure. Accuracy in one calculation is not the same as relevance to a different claim. Mention both to earn the reasoning rather than just the number.
Reading check. A correct calculation can answer the wrong question.
27. Distinguish quoted and calculated
Question. The passage states 18 volunteers and 24 total. Is 75% directly quoted?
Worked answer. The fraction 18/24 is given, while 75% is calculated from it. The percentage is defensible but should be recognised as derived rather than a verbatim statement. In a question asking for words from the source, supplying only the calculated percentage may not match the requested response format.
Reading check. Follow instructions about quotations, paraphrases and own-word responses.
28. What is omitted?
Question. The report gives no independent before-and-after acoustic measurement. Why does that absence matter?
Worked answer. Without comparable performance evidence, the team cannot demonstrate that installing the panels achieved the desired improvement. The missing evidence is not merely a bureaucratic detail; it separates financial feasibility from effectiveness. A complete answer explains the conclusion that cannot yet be drawn because of the omission.
Reading check. When asked about a limitation, complete the sentence ‘therefore the writer cannot claim…’.
29. Critique a title
Question. A student titles the passage ‘A Guaranteed Silent Library’. Is that appropriate?
Worked answer. No. The original passage is about deciding whether to test a panel proposal under cost constraints. It explicitly withholds a guarantee. The dramatic title changes the writer’s qualified report into an outcome claim. A better title would foreground the proposed pilot and the need for evidence.
Reading check. A title should not promise certainty that the text itself rejects.
30. Vocabulary in context: ‘controlled’
Question. What does ‘a carefully controlled pilot’ mean here?
Worked answer. It means a trial designed to keep relevant comparison conditions consistent so that the outcome is interpretable. ‘Controlled’ does not refer to ordering students around or restricting their movements for its own sake. The nearby discussion of varying conditions and missing before-and-after data guides the contextual meaning.
Reading check. Test your proposed definition by replacing the word in its sentence.
31. Vocabulary in context: ‘adopt’
Question. What does it mean that the report did not ‘adopt’ the leaflet’s promise?
Worked answer. The report chose not to use or endorse that assertion as its own conclusion. The word does not mean physically taking possession of the leaflet. The context is a dispute about evidential strength: an enthusiastic claim is mentioned but not accepted as a verified finding.
Reading check. Choose the meaning that makes the sentence coherent.
32. Language effect of numbers
Question. Why does the writer supply both prices rather than saying one offer is cheaper?
Worked answer. Exact figures allow the reader to check the comparison against the $1,000 cap and judge the margin. They create transparency in the argument. This does not mean that the writer becomes correct about all other issues: the evidential value of each number remains tied to the relevant claim.
Reading check. Explain the function of the figures, not merely that ‘numbers make it factual’.
33. Source comparison
Question. A poster later claims that the preferred room’s panels are proven to reduce noise. Which source idea challenges this?
Worked answer. The report states that no comparable before-and-after acoustic results were available. That omission directly limits the poster’s performance claim. In a compare-sources response, identify the common issue, explain the difference in certainty and quote or paraphrase the relevant evidence without importing unrelated technical details.
Reading check. Comparison is strongest when both statements are assessed on the same question.
34. The writer’s stance
Question. Is the report simply for or against the panels?
Worked answer. Neither description is adequate. It favours considering an affordable option through a controlled pilot, while withholding a claim of proven acoustic benefit. That combination is conditional support. A strong answer can describe a nuanced stance without reducing it to an emotional label such as enthusiasm or distrust.
Reading check. Look for the action the writer accepts and the assertion the writer refuses.
35. Summarise only the reasons
Question. A summary task asks why a trial is needed before expansion. What belongs?
Worked answer. Relevant ideas include the absence of comparable acoustic evidence, the limits of interpreting echo delays as speech clarity, the survey’s differing visit conditions and the need to verify effectiveness before wider purchase. The number of panels in each offer may be peripheral if the specified summary scope concerns uncertainty about performance.
Reading check. Select the content by question scope before attempting to shorten sentences.
36. Preserve a negative in a summary
Question. The passage says that timing does not directly measure speech clarity.
Worked answer. A rushed summary that says ‘timing measures speech clarity’ reverses the meaning by removing ‘not’. The correct compression is ‘echo delays cannot establish speech clarity’. This is short, accurate and preserves the limit. Good paraphrasing protects logical negatives even when it replaces most of the words.
Reading check. Underline negative words before editing down a point.
37. Avoid copying a decorative phrase
Question. The leaflet calls the materials ‘transformative’. Should the summary repeat it as a benefit?
Worked answer. Not as an established benefit. It can be mentioned, if relevant, as a supplier claim that the report did not endorse because evidence was lacking. Treating promotional language as a verified effect would import an unsupported judgement into the summary. A concise answer usually needs the information gap more than the marketing adjective.
Reading check. Identify whether a quotation is endorsed, questioned or merely reported.
38. Answer a two-part question
Question. Explain why A qualifies now and why further testing is required.
Worked answer. A is within the $1,000 budget and satisfies the 12 m² area requirement, but the text offers no comparable evidence that panels produce the desired acoustic improvement. Both halves are necessary. A student who answers only the cost calculation or only the need for testing leaves the central contrast unexplained.
Reading check. When the question contains ‘and’, reserve a clause for each requested element.
39. Evaluate a sweeping conclusion
Question. A draft says ‘The survey proves all students would choose Room A.’
Worked answer. The source records 18 preferences from 24 volunteers; not everyone in the sample chose A, and the sample is not all students. The visits also took place at different times. The draft exaggerates the quantity, population and evidential strength. A repaired sentence reports the limited preference without claiming universal behaviour.
Reading check. A good correction identifies every changed condition, not just one error.
40. Complete an exam-ready response
Question. Question: Why does the writer recommend a pilot rather than immediate expansion?
Worked answer. The existing quotations show that one panel option meets the cost and area limits, but its effect on room acoustics has not been established by comparable before-and-after measurements. The volunteer preferences were gathered under different conditions, so they cannot settle effectiveness either. The pilot is proposed to test the outcome before committing to more purchases.
Reading check. The answer links decision, evidence gap and action in three direct sentences without inventing new data.
Build an answer that can be marked
Start with the response type. If asked to identify, give the exact detail. If asked to explain, state the relationship that makes the detail relevant. If asked to infer, connect evidence with a careful conclusion. If asked about language, name the effect of a specific choice. If asked to summarise, gather the points inside the defined scope and make each idea count. The examination rewards comprehension of this particular source, not the reproduction of a memorised speech about critical thinking.
A useful final review checks attribution, certainty and scope. Does every number still refer to its correct person, room or option? Have you kept limits such as ‘present’, ‘estimated’, ‘some’, ‘before’ and ‘not’? Are you accidentally answering with personal experience when the question calls for textual evidence? Is the answer proportionate to its marks? This is the moment to remove an unsupported leap, not to add impressive language.
Continue to the next owners
This guide turns the fictional Volume 0308 library quiet-zone audit into a comprehension passage. The physical model is explained in Volume 0307 on echoes and sound; numerical labels and inventory reasoning in Volume 0306; and quantifier scope in Volume 0305. For different English intent, use Volume 0301 on analogies and examples, Volume 0249 on paragraph roles, Volume 0185 on evidence verbs and Volume 0245 on 80-word summary writing. These are related skills, not substitute copies of this source-status method.
The PSLE echo-sounder evidence case trains the early habit of refusing to convert an instrument reading into an unsupported conclusion. New secondary students can follow the post-PSLE route and the subject owners for G3 English, G3 Mathematics and G3 Science. The Secondary 1 Mathematics foundation guide shows the same care with labels in a numerical subject. The authority for actual assessment requirements is SEAB’s 2027 G3 syllabus index and the official K300 English syllabus.
