Use ACT's own online prep for official-worded practice and, when it offers them, timed sections. Treat it as the first bank—not as a third-party course you have to finish.
A simple order
- One diagnostic core, timed.
- Drills only on the miss types from that core.
- A second timed core before you buy another book.
When the book is enough: is the official guide enough. Older paper: old practice tests.
What to ignore
Completion badges and video libraries that do not match your error log. A second paid bank is optional: best prep books.
The bottom line
Official online prep is a source of official questions. Use the ones that match your misses. Do not binge the catalog.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.