Students solve all the clues but the lock doesn't open because the teacher set the wrong combination. The Fix: Test your safe combination ten times before the first student touches it. Use a sharpie mark on the back of the lock so you know which is the teacher override.
Students solve all the clues but the lock doesn't open because the teacher set the wrong combination. The Fix: Test your safe combination ten times before the first student touches it. Use a sharpie mark on the back of the lock so you know which is the teacher override.