Grade threshold for To-Do list

It would be really cool if there were a feature to make it so the to-do list only automatically checked off items once they receive a grade above a certain threshold. When I do homework through external software (like Pearson, for example), sometimes I will do a few problems then have to come back to it. It would be amazing if there were some way to make it so that just having a few questions done (and about a 10% for that assignment), then it would not remove the item from the to-do list.