SAT READING & WRITING · RACHEL · CLASS 05 · OCTOBER 3
Class Summary
Class Recap
- Reading: Main Idea: Question 1 (a science text) and Question 2 (a literary text), taught in full.
- Reading: Text Structure and Purpose: the main purpose question about the lunar soil experiment (Demo 3).
- Not reached today: Subject–verb agreement and the comma. Rachel chose to keep working on reading strategy.
- Homework: 20 questions on main idea and main purpose, plus a 10-question grammar and punctuation preview (5 subject–verb agreement, 5 comma). The preview shows how much review those two units need.
Main Idea
- Where main idea fits. We started with claim and evidence, then function and overall structure. Main idea is the first “meaning” question and the easiest one. Inference questions come later.
- Main idea vs main purpose. Main purpose choices begin with an author action (describes, compares, presents, discusses), so you can drop some choices from the verbs alone. Main idea choices state content and have no such verb, so you have to read the text.
- First 1–3 seconds: which reading order? If the text has a clear pattern (a named researcher or mission, a clear object of study, a visible shift), read the text first. If it is a direct quotation from a story or play and you do not know the author, read the four choices first.
- A study about a novel is different from a quotation from it. “Researchers found that the novel explores …” is a humanities study, so use the normal structure map. A passage quoted straight from the novel is literature, so read the choices first.
| Layer of the text | What it does | Question 1 (Aspera) |
|---|---|---|
| Big Direction | the main topic and what is happening to it | NASA’s Aspera mission will investigate the CGM |
| Sub-development | the big direction zooms in to a smaller one | “Specifically”: the “warm-hot” gas |
| Change / movement / shift | a problem, barrier, turn or new factor | never observable before → a new telescope |
| Conclusion | where the text ends up | the mission should help answer how galaxies emerge and change |
- Overall mapping trap. A hard choice can match the big direction and the sub-development but carry one rotten word in another layer, for example a change the text never states. One rotten word ruins the whole choice, so eliminate it.
- What is left after the trap. A choice that maps only the big direction can still be correct, even if that idea sits in one sentence. A choice that holds only one small layer (only the barrier, only one detail) is not the main idea.
- Question 1, choice by choice. A puts the researcher in place of the mission; a researcher is not the mission. B (“unable to directly observe”) is not too strong, because the text has a real barrier and “unable to directly” still leaves indirect study possible. But B is only the barrier layer, the closest trap. C adds a possibility the text never states (galaxies interacting) and stretches the last few words into a topic. D maps the arc: the mission, the first direct observations, and why the gas matters.
- Question 2, reading the choices first. Find the word all four choices share, here time / sense of time. That is the big theme. B only retells the plot (a negative reaction after the move), while A, C and D interpret what the change shows, so B can go early. Then check the details: C says “similar to Tomas and Tereza”, but the text never gives the people’s sense of time. D says “as is the case for other dogs”, but no other dogs are mentioned. A remains.
- For a literary main idea, eliminating choices is usually easier than predicting the exact answer.
Text Structure and Purpose — Main Purpose
- Order of work. (1) Glance for one second: is it science/research, literature or something else? (2) For a research text, read the first verb of each choice and do a quick first elimination. (3) Read and divide the structure. (4) Check the choices that are left, reading each one to the end.
| Part of a research text | What it does | Words that signal it |
|---|---|---|
| Background | why the topic matters | names, setting, what is known |
| Theory | what earlier research said, or a gap in it | previous studies, it has long been thought |
| Hypothesis | a prediction that still has to be tested; comes after the theory and before the method | hypothesized, predicted, assumed, expected |
| Method | how the data were collected: an experiment (most common on the SAT), interviews or questionnaires, data or computing | samples, control group, tested, measured |
| Findings | what the study found (usually the focus) | found that, showed, revealed |
| Contribution / limitation | what the findings mean, or what they cannot show | suggests, indicates, however, cannot |
- One study → the purpose is about its findings. When the text presents one study, choices built only on the method are usually wrong on a first pass. Come back to them only if the others fail.
- The exception. If an earlier researcher takes a small part and a new researcher takes the larger part to attack the earlier work, the attack is usually on the method. In that structure, method words in a choice can be right.
- Hypothesis vs claim. A hypothesis is an assumption made before the research, and it can turn out wrong. A claim is the researcher’s conclusion after the research (“my research claims that …”), stated with certainty.
- Hard words, easy question. Technical vocabulary does not make a structure or purpose question hard. You do not need to understand every term, only which part of the research each sentence is.
- Hypothesis: The team predicted that plants grown in lunar soil would show signs of stress.
- Finding / claim: Plants grown in lunar soil showed clear signs of stress.
- Demo 3 mapped. Sentence 1 is the method: seeds planted in lunar regolith and, as a control group, in Earth soil. “They found” gives the findings: stunted roots. “Moreover” adds more findings and what they mean: signs of stress, confirmed by molecular analysis. There is no hypothesis, so C (“evidence in support of the hypothesis”) fails. D, “discusses the findings of a study that evaluated the effects of exposing a plant species to lunar soil conditions”, fits.
- Why not A. Several scientists’ names suggest an experiment, but A describes the experiment as answering a different question (how much regolith resembles Earth soil). The study tested what lunar soil does to the plants.
Review Tips
- Main idea: Before the choices, write the four layers in the margin (direction / zoom-in / change / conclusion). Then test every part of every choice and look for the one rotten word.
- Literary main idea: If it is a quotation and the author is new to you, read the choices first, find the shared theme word, then eliminate.
- Main purpose: Name the text type in one second. Predict a lead verb + topic + limit. For a single study, look for the findings, not the method.
- Homework: On each question, mark the layers or the research parts before you choose. Do the preview without notes; the result decides how much grammar and punctuation review we do next.