I recall in one of my classes earlier this year that I had a student who always 'hid' their working out from me when I walked around to see how well they're going with the question. The usual practice is for me to do a few worked examples, and then for me to give them time to try similar questions themselves.
During this time, I walk around the class to see how they are going and explain things individually if needed. Sometimes I call attention to the class to address a common problem.
I cannot help this student because they are clearly struggling and are too embarrassed to let me see their working out.
What strategies do you suggest in this kind of scenario? I would like to pull them out after class to have a quiet chat with them about it, but I feel that they'd be too intimidated even though I try to be as friendly as possible!