If you are a teacher, you will understand that on Casper Focus there is a locking glitch. When you lock the iPad, it unlocks after 15 seconds. You can stop that from happening. What you do is try deleting the app and reinstalling it. If that does not work you could try
"Hard Rebooting" your iPad. If you do not know how hi,d your home button and power button until it shuts off then hold them down until it turns on again.
