I realized that I was repeating comments and corrections while grading a recent two dimensional design assignment. The students were instructed to make four designs total incorporating and illustrating the concepts of imbalance, asymmetrical balance, axial balance, and radial balance. It occurred to me that while many students made designs that incorporated these concepts, a large number simply executed descriptive diagrams, i.e. they understood the concept but did not apply it to the design process. I've come to the conclusion that my assignment was not clear enough at outlining the desired outcome in the first place. The solution is to accept error as a call for correction and to immediately adapt the assignment sheet for subsequent classes. I also plan on reflection periods after each assignment even if they seem to go well. In this way I hope to continuously improve my assignments.
I have started keeping the original assignment document open while I grade. I make changes in the assignment as they naturally occur to me during the grading process. For example I kept writing comments in a margin on one part of the assignment sheet. I solved this problem by adding spacing for comments in the body of the document.