The summer before junior year is for a diagnostic core, a weak-section habit, and a fall date on the calendar—not a two-test binge. September and October sit right after.
A simple June–August shape
- Week 1: one timed official English–Math–Reading core.
- Most weeks: two short sessions on the weakest core.
- Last week of August: a second timed core, then pick September or October.
Fall dates: September ACT.
The bottom line
Enter junior year with a number and a date. Do not spend July taking five full tests you will not review.
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.