Where I studied, every classroom had a blackboard and a projector, with the rollable white screen just above the board. When you show slides, roll out the screen. When you need the board, either use the portion beside the screen or roll up the screen if you don't need it at all.
Where I studied, every classroom had a blackboard and a projector, with the rollable white screen just above the board. When you show slides, roll out the screen. When you need the board, either use the portion beside the screen or roll up the screen if you don't need it at all.