One shared worksheet or individual work

A fictional teacher wants each learner to explain a science observation independently. The teacher attaches one editable document to a class activity, and early students begin overwriting headings and answers in the same file. The purpose is to see individual reasoning rather than produce a group report. Some learners have already written useful responses, so deleting the shared file would also remove evidence of their work. The teacher can review the relevant assignment and attachment options for the school account. The scenario does not state that every feature is available in every edition, and the task is to choose a suitable workflow while preserving existing work.