I just noticed recently that when I would input a zero into an assignment for a student who had not turned in the work it would automatically change the status from "Missing" to "None".  Now when students look for missing work, they do not see those assignments as "Missing".  Is this a feature that can be turned on/off?  This is something that didn't use to happen, and I would like the ability for the assignment to be labeled as missing to help students identify what assignments they need to complete still.