переведите на российский : 1)a place where pupils have their lessons

Переведите на русский : 1)a place where pupils have their lessons 2) a place they sit at 3) a place where pupils can write 4) a thing which helps pupils to draw lines 5) a thing which helps them to rub something out in their exercisebooks 6) a thing which helps a teacher to show something on the blakboard 7) a thing with the help of which we clean the furniture