Best ACT English Study Resources 2026: Grammar Rules, Punctuation Drills, and Score-Level Plans

Updated on May 23, 2026. ACT English exam details reviewed against official ACT resources at act.org.

Best ACT English Study Resources 2026: Grammar Rules, Punctuation Drills, and Score-Level Plans

The ACT English section is 75 questions in 45 minutes — 36 seconds per question on average. The section presents five passages of about 300–400 words each, with 15 questions per passage. Questions ask you to correct grammar errors, improve phrasing, and make rhetorical choices about structure and style. Unlike the Digital SAT Reading and Writing section, ACT English does not test reading comprehension — it tests editing judgment.

What does ACT English actually test?

ACT English divides questions into two categories:

• Usage/Mechanics (53%, approximately 40 questions):
  • Punctuation (13%, ~10 questions): commas, apostrophes, semicolons, colons, dashes
  • Grammar and Usage (16%, ~12 questions): subject-verb agreement, pronoun-antecedent agreement, verb tense, modifier placement
  • Sentence Structure (24%, ~18 questions): comma splices, run-ons, sentence fragments, parallel structure, subordination
• Rhetorical Skills (47%, approximately 35 questions):
  • Strategy (16%, ~12 questions): adding/deleting information to achieve a stated purpose
  • Organization (15%, ~11 questions): logical sequence of sentences, paragraph order, transition effectiveness
  • Style (16%, ~12 questions): word choice, redundancy elimination, relevance of supporting details

The most common error: students who only review grammar rules miss the 35 Rhetorical Skills questions that require judgment about purpose and organization rather than error identification. Both halves of the section need explicit preparation.

ACT English resource comparison

Resource	Cost	Grammar Focus	Rhetorical Skills	Best Score Target
ACT Academy (Official)	Free	Yes	Yes	Any — use first
Official ACT Online Prep	$39.95	Yes	Yes	Any — most realistic
Erica Meltzer ACT English	~$20–30	Excellent	Good	24–36, grammar-heavy
The Princeton Review ACT	$179+	Good	Good	20–30
Magoosh ACT	$129/6 mo.	Good	Good	26–36
PrepScholar ACT	$39.95/mo.	Good	Excellent	28–36

For students scoring below 22, Erica Meltzer's grammar workbook is particularly effective because it explains rules explicitly and drills them with ACT-formatted examples — more targeted than general English prep courses. Above 26, official materials and PrepScholar or Magoosh provide the volume of practice needed.

Five most commonly tested grammar rules with examples

Rule 1: Comma with introductory elements

Use a comma after an introductory phrase or clause that precedes the main clause.

Incorrect: "After the storm passed the streets were flooded."

Correct: "After the storm passed, the streets were flooded."

ACT practice: "Having studied for three days without rest [BLANK] Maria finally felt prepared for the exam." The blank should be a comma — the opening participial phrase requires a comma before the main clause.

Rule 2: Subject-verb agreement with intervening phrases

The verb must agree with the subject, not with the nearest noun.

Incorrect: "The list of requirements have been submitted."

Correct: "The list of requirements has been submitted." (Subject: "list," singular)

ACT trap: "The team of engineers, along with their project manager, [is/are] responsible for the delay." Correct: "is" — the subject is "team," singular. "Along with" is a modifier, not a conjunction that makes the subject plural.

Rule 3: Apostrophes — its vs. it's, whose vs. who's

"Its" is possessive (no apostrophe). "It's" is a contraction for "it is."

Incorrect: "The company revised it's policy last year."

Correct: "The company revised its policy last year."

Test: Can you substitute "it is"? If yes, use "it's." If not, use "its." Same logic for "whose" vs. "who's."

Rule 4: Comma splice correction

Two independent clauses cannot be joined with only a comma. Fix with: (a) semicolon, (b) period, or (c) coordinating conjunction + comma.

Incorrect: "The temperature dropped sharply overnight, the pipes froze by morning."

Correct options:

• "The temperature dropped sharply overnight; the pipes froze by morning." (semicolon)
• "The temperature dropped sharply overnight, and the pipes froze by morning." (FANBOYS conjunction)
• "The temperature dropped sharply overnight. The pipes froze by morning." (period)

Rule 5: Parallel structure in lists

Items in a series must use the same grammatical form.

Incorrect: "She enjoys hiking, to swim, and cooking."

Correct: "She enjoys hiking, swimming, and cooking." (all gerunds)

ACT practice: "The new policy requires employees to log hours, [submitting / to submit] expense reports, and attending weekly check-ins." → "to submit" (parallel with "to log" and "attending" is already wrong — the full correct version would be "to log, to submit, and to attend").

Score-band recommendations

• Below 20: ACT Academy + Erica Meltzer grammar workbook. Focus entirely on Usage/Mechanics before touching Rhetorical Skills. Comma rules and subject-verb agreement questions are the lowest-hanging score increases.
• 20–26: Official ACT prep + Princeton Review. Begin mixing Rhetorical Skills practice — especially organization (logical sentence order) and strategy (adding/deleting information based on purpose). These questions require a different skill than grammar correction.
• 27–36: Magoosh or PrepScholar + heavy focus on Style and Organization questions. At this level, grammar is solid; points lost are on subtle rhetorical judgment calls and pacing (running out of time on the last 10–15 questions).

8-week ACT English study plan

• Weeks 1–2: Grammar foundations (punctuation, subject-verb agreement, apostrophes). 20–30 targeted grammar questions daily. Review every error immediately.
• Weeks 3–4: Sentence structure (comma splices, parallel structure, modifiers) + introduction to Rhetorical Skills (strategy questions).
• Weeks 5–6: Rhetorical Skills — organization and style. Practice adding/deleting sentences with stated purposes. Time yourself on full 45-minute English sections.
• Weeks 7–8: Two full practice tests per week. Error analysis: track whether wrong answers are grammar (Usage/Mechanics) or judgment (Rhetorical Skills) to adjust final review focus.

Grammar rules that overlap with the Digital SAT Writing section are covered in our companion guide to grammar rules that overlap with SAT Writing — useful if you are preparing for both tests. For adaptive ACT English drilling that identifies your specific grammar gaps, SimpuTech's ACT AI tutor builds practice sets from your error patterns. Start your free session at simputech.com.