I work with a student every day during math class and assist him with his practice problems. Typically, we will do one problem together then he will try to do the problem on his own. Recently, he will understand how to do the problem with my assistance but when he starts doing it on his own he says he doesn't know how to do then asks me for help. What should I do?
I would ask the student to show you their work, so that way you can see what sections they are getting caught up on. It may be that they are simply unconfident in their abilities, or that there is a section that they have an issue with that is being skimmed over when you work together.
Adapting the structure of the lesson may help the student build confidence in their individual work.