Tablet can work effectively. Works for a day until the battery runs out, but the teachers are human beings. There is a sense. Be tired of teaching in teaching performance may be reduced.
tablet can function effectively. You can not work until the battery runs out. The teacher is a human feeling to fatigue. The teaching may decrease the effectiveness of teaching.
Tablet can work effectively. Can work never tired until battery runs out, but my teacher is the man of feeling can be exhausted. From teaching may make teaching effectiveness reduced .