In your Bb classroom, get into the control panel, then gradebook. You will see a lock for that student under the appropriate assessment column; click on the lock and then you will see “View." Click on the word View and then you will see the words “clear attempt." Click on clear attempt and you will be prompted to make sure that is what you want to do. If it is, then click yes and the attempt will be cleared and the student will be able to take the assessment again.