You spot something
A wrong answer key, an unclear solution, a translation slip or a button that doesn't work.
You flag it in two taps
Use the ⚑ Report button on any question, or the Feedback button at the bottom of every page.
We review within 48 hours
A subject expert checks every flag about a question. Nothing is changed without checking.
We fix it and say thanks
Fixes are listed below, so everyone can see the site getting better because of students.
Flag something now
Found a problem with a question? Open it and press ⚑ Report. For anything else:
Please don't include phone numbers or personal details in feedback.
Fixed, thanks to you
Every fix made from a student report will be listed here. Be the first to help!