- Fri Nov 14, 2003 6:06 pm
#3500
How many time a teacher has to erase what he
wrote on the ordinarey blackbord , Why not to make an LCD Like blackboard where teacher can write using a special pen with no ink , when he finsh writing he can simply press a buttom and all will be erased.
wrote on the ordinarey blackbord , Why not to make an LCD Like blackboard where teacher can write using a special pen with no ink , when he finsh writing he can simply press a buttom and all will be erased.