Assessment for Learning

I have been trying some different Assessment for Learning(AFL) strategies in my high school Mathematics classes this semester. Yesterday, I gave a vectors assignment to my Applied Math 30 class. I had them complete the assignment in class but after each question come to my desk and have me check over their work and their solution.

It worked great!!! I was able to see how each student was progressing, I was able to reteach or assist the students with difficulties or misunderstandings. In the past, I gave out the assignment, had the students complete the assignment and them took it in for grading. The OLD way let me see what students knew and did not know but did not allow me to help them out in any way.

The problem I have is that in the past I would have had a mark to place in my markbook. Even though I did "mark" every students assignment as they did it I do not have anything recorded for this assignment. I realize that it is assessment for learning so the students are still 'learning" the material but I should document some how the progress of each student on this assignment.

Do I use a rubric? Do I use a checklist? Not sure how I can document my students progress. Any suggestions are welcome.