I glue one part to the blackboard and the other part to the pencil. When a student needs a pencil, he goes to the blackboard, takes a pencil and writes his name on a blank space. Works perfectly!
XFasten Super Strong Duct Tape, White, 2" X 50 Yards Waterproof Duct Tape For Outdoor, Indoor, School And Industrial Use
33 Review
Gorilla Tough And Wide Silver Duct Tape, 2.88" X 25Yd - Pack Of 1 For Superior Strength And Durability
23 Review
Strong & Wide White Gorilla Duct Tape, 2.88" X 25 Yd, Pack Of 1
24 Review
Industrial-Strength Double-Sided Woodworking Tape, 4"X30 Yards Yellow CNC Machine Tape For Woodworkers And Crafters - Removable Woodturner'S Tape From XFasten
52 Review