I’m a great believer in extra help. Pity so few kids take advantage of it by coming during office hours.
There’s help. Thanks to Jing, and the class wiki, I can “push” extra help at individual students. Here’s three videos I made this morning, all for the same student. They’re not only here; they’re also on the student’s user page on the wiki. So if they’re checking their own user page regularly, they’ll see the extra help they need to get.
And getting the extra help to the student, in a timely fashion and in a form that they can remember, is probably half the battle.