You need to abide by any scoring practices that your school district has. But typically, you will not need to record scores for every assignment. There will be some practice work that your students do that will not get entered in the gradebook. You may also have students work through some assignments as a class, correcting them as you go. In this case, there would be no need to record final scores, as everyone would have earned 100%. When you look through your lesson plans, you will be able to identify which lessons need graded and recorded, and which ones do not.