When the student answers a quiz question wrong, it's great to have a feedback box with the correct answer, but once you've answered correctly, it's usually unnecessary to get a box that you have to (first find the little almost invisible tick and then) close before you can click “next” to move on to the next question. I wish it were possible to choose not to have that feedback box when the student answered correctly. In the app, you can click “next” directly, without closing the feedback box, but on the PC you have to close the feedback box first, because the box ends up on top of the “next” button.