12-Week Review Diagnostic — Mixed-Genre Practice & Answer Key

You have finished twelve weeks of work — reading, grammar, argument, and the extended response. Before you start the timed practice tests in Weeks 13 and 14, take this diagnostic. It is not a grade. It is a map. Its only job is to show you, honestly, which parts of the course to revisit so your final practice time is spent where it matters most.

How this diagnostic works

• Read the long passage below. It is written in three connected parts: an informational report, a short literary scene, and an argument essay — the three genres the GED® RLA test draws from.
• Answer all 25 questions. Do not look back at the answer key until you finish.
• Score yourself with the master key at the bottom. Then use the chart to group your wrong answers by content domain and revisit the sessions listed for your weakest area.

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A quick word before you begin. Twenty-five questions feels like a lot when you are tired, but every question here is built from skills you have already practiced. If a question feels unfamiliar, that is the diagnostic doing its job — it has found a session worth revisiting. Mark it, keep going, and trust the map at the end.

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THE PASSAGE: "The Quiet Hour"

Part A — Informational: A Report on School Start Times

(1) For most of the last century, the typical American secondary school opened its doors before eight o'clock in the morning. (2) The reasons were practical rather than scientific: early dismissal left room for after-school jobs, athletics, and bus routes that could be reused for younger students later in the day. (3) In recent decades, however, researchers studying adolescent sleep have questioned whether that long-standing schedule serves students well.

(4) The core finding is biological. (5) During the teenage years, the body's internal clock shifts later, a change scientists call a delay in the circadian rhythm. (6) As a result, most adolescents do not feel naturally sleepy until close to eleven at night, yet many must wake before six to reach a school that begins at seven-thirty. (7) The gap between when teenagers can fall asleep and when they must rise produces what sleep specialists bluntly call chronic sleep debt.

(8) The consequences reach beyond yawning in first period. (9) Studies have linked insufficient sleep in teenagers to lower test scores, higher rates of car accidents among young drivers, and increased reports of anxiety. (10) One large district that pushed its high-school start time from 7:25 to 8:35 reported, two years later, a measurable drop in tardiness and a rise in attendance. (11) Critics, however, note that later start times can complicate family schedules, transportation budgets, and the after-school activities that many students depend on.

(12) No single policy fits every community. (13) Still, the research has shifted the conversation: the question is no longer whether teenage sleep matters, but how schools can honor it without unraveling everything built around the old clock.

Part B — Literary: A Scene Before Dawn

(14) The alarm went off at 5:40, and for one cruel second Maya believed it was a mistake. (15) The room was the kind of dark that feels solid, like a held breath. (16) She lay still, bargaining with the ceiling: five more minutes, three more, one.

(17) Downstairs, the kitchen light buzzed awake before she did. (18) Her mother was already at the counter, pouring coffee with the slow, automatic motions of someone who had stopped expecting the morning to be pleasant. (19) "The bus comes in twenty," her mother said, not unkindly, the way you might remind the tide to come in.

(20) Maya pressed her forehead to the cold window. (21) Outside, the street was still wearing night — porch lights like distant, patient eyes, the sky the deep blue of ink not yet dry. (22) She thought about the test in second period, the words she had read three times last night and could no longer summon. (23) Somewhere in her tired mind they had dissolved, the way sugar disappears into water and leaves only a faint, useless sweetness behind.

(24) "I'm up," she lied to the empty stairwell, and went to find her shoes.

Part C — Argument: Schools Should Start Later

(25) The evidence is no longer in doubt, and neither should our response be: secondary schools should begin the academic day no earlier than 8:30 in the morning. (26) This is not a matter of indulging tired teenagers. (27) It is a matter of aligning our schools with what we now reliably know about the adolescent body.

(28) Consider first the academic cost of the status quo. (29) When a student arrives having slept five hours instead of eight, no amount of effort fully closes the gap; the brain simply cannot encode and recall information as well while running on debt. (30) We would never ask a student to take a test underwater and then blame the student for drowning. (31) Asking a chronically sleep-deprived teenager to perform at full capacity is, in its quieter way, the same demand.

(32) Opponents raise real concerns — bus schedules, sports practices, the jobs some students hold. (33) These concerns deserve respect, not dismissal. (34) But notice their shape: every one of them is a logistical problem, and logistical problems have logistical solutions. (35) Biology does not negotiate. (36) A district can stagger its bus routes or shift practice an hour later far more easily than a sixteen-year-old can rewire the timing of her own sleep.

(37) Critics sometimes argue that students should simply go to bed earlier. (38) This sounds reasonable and is, in fact, the weakest objection of all, because it ignores the very biology at issue: an adolescent told to sleep at nine will mostly lie awake, just as an adult told to nap at noon would. (39) We cannot will our internal clocks into obedience.

(40) The choice before us is not between convenience and inconvenience. (41) It is between a schedule built for buses and a schedule built for brains. (42) When we know which one serves our students, the responsible path is clear.

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THE QUESTIONS

Answer all 25. Track which you find hard — those flagged numbers are your map.

Reading Comprehension (Questions 1–9)

1. Which statement best expresses the central idea of Part A?

2. In sentence (7), the phrase "chronic sleep debt" most nearly functions to —

3. According to Part A, which detail best supports the claim that later start times produce measurable benefits?

4. Which choice best summarizes Part A in one sentence, without copying the author's wording?

5. In Part B, what can you most reasonably infer about Maya's mother from sentence (18)?

6. The simile in sentence (23) ("the way sugar disappears into water") chiefly conveys —

7. How does Part B develop the idea introduced in Part A?

8. Which sentence in Part B best signals the setting without stating the time directly?

9. Across all three parts, which statement about structure is accurate?

Vocabulary, Tone & Purpose (Questions 10–13)

10. As used in sentence (5), the word "delay" most nearly means —

11. The overall tone of Part C can best be described as —

12. The author's chief purpose in writing Part C is to —

13. In sentence (19), the comparison "the way you might remind the tide to come in" mainly suggests that the mother's reminder is —

Grammar & Mechanics (Questions 14–20)

14. Which revision best corrects the run-on? "The alarm rang Maya did not move."

15. Choose the version with correct subject-verb agreement.

16. Which sentence uses the apostrophe correctly?

17. Which sentence corrects the misplaced modifier? "Buzzing on the counter, Maya ignored the phone."

18. Choose the version with correct parallel structure.

19. Which choice best fixes the pronoun-antecedent error? "Each student must bring their own pencil." (formal edited English)

20. Which sentence is punctuated correctly?

Argument & Evidence (Questions 21–25)

21. What is the central claim of Part C?

22. In sentence (30), the image of taking "a test underwater" is an example of —

23. Which sentence in Part C most clearly signals that the author is addressing a counterargument?

24. According to Part C, why does the author call "just go to bed earlier" the "weakest objection of all"?

25. Comparing Part A and Part C, which statement is accurate about how each treats the same evidence?

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MASTER ANSWER KEY

Score one point per question (25 total). Each explanation tells you the correct answer, why, a Pro tip, and the session to revisit if you missed it. After scoring, use the chart above to find your weakest domain.

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WHAT YOUR SCORE MEANS

• 21–25 — On track. Your foundations are solid. Begin the timed practice tests in Weeks 13 and 14. Use any misses above as a light warm-up.
• 16–20 — Almost there. Group your wrong answers by domain using the chart, revisit your weakest one or two areas, then start timed practice.
• 0–15 — Rebuild first. Do not rush into timing yet. Revisit the flagged sessions for every domain where you missed more than one question. A few focused review hours now will save you many frustrated ones later.

A final note before Week 13. Speed comes last, not first. Accuracy under no time pressure is what you just measured; once that is steady, timing is mostly a matter of practice and pacing. Fix the what this week, and the how fast will follow in the two weeks ahead.