Verified answer

1 a bin 2 a blackboard 3 a calculator 4 some chairs 5 a computer 6 some cupboards 7 a desk 8 an eraser 9 an exercise-book 10 an interactive whiteboard 11 a pen 12 some pencils 13 a pencil case 14 a pencil sharpener 15 some rulers 16 a schoolbag 17 some shelves