Students may be allowed to redo homework papers that are D's or F's as long as these papers were turned in on time, and there was a clear misunderstanding of the assignment on the part of the student. (In other words, not because the student rushed through the assignment or showed a lack of effort.) Students may earn up to half of their missed points back. For example, if a student earns a 50% on an assignment, and then redoes the assignment and gets a 100%, that student will get the grades changed to a 75%. Redo work is due prior to testing or the end of the unit we are studying.