Flag on the digital ACT is a bookmark, not a second score. Mark items you will return to, keep moving, and use the review screen in the last minutes. Do not flag half the section.
What to flag
- Items you can finish with one more look.
- Math you will backsolve if time remains.
Leftover-time order: leftover time.
What not to flag
Every hard item. If you will not return, guess and go. Practice the click path on a screen if you sit digital: paper vs digital practice.
The bottom line
Flag is a short list. Use it so the review screen has a job— not so you can admire 20 bookmarks at minute 34.
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.