the timed practice should be changed (slightly)
when i do timed practice and i get a question wrong i want to see why i am wrong but the timer still goes on so could you make the timer stop if you want to read about what you did wrong?
Yes, but at the end of the timed practice you can click on "Review lesson", where you have your answers and the right ones. ;-)
You can click the Discuss button to open the corresponding discussion in a new tab, then come back to continue your timed practice. After you finish, you have your answers in the Review page, and the discussions opened in the other tabs.