When you are taking a timed section or even just a small practice(the five questions we get with immediate feedback), we should be allowed to take notes on what we got wrong. You can add an additional tab to the dashboard where we can review everything we did before and access any notes we made to ourselves. For example, I got a question wrong because I mixed up horizontal and vertical compression. There should be a way for me to go back over questions I got wrong, just like I can with a paper book(not to mention, I can write whatever I want in the book!).