This last semester I have been teaching in a computer lab with a lecturer and another person. The students are given problems to do in either the computer algebra package called Maple, or the numerical package: Matlab. If the students have problems I go over and help them. I believe that this is giving feedback to the students. However, it is not clear that the classification scheme used by the PGCAP people would regard my activities as formative assessment, or providing feedback.
The lecturer collected, from students who wanted to, some of their programs. He promised to give them feedback on them. It is nor clear how effective this type of feedback is. He could only check that the format of the programs accords to his style guide. For example, he could check that the program has enough comments.
I sometimes get students to email me programs, when I can't debug them in front of them