 a book |
 a calculator |
 a classroom |
 a sheet of paper |
 a pencil |
 a teacher |
 a pupil |
 students |
 a test |
 a pen |
 a blackboard |
 a fountain pen |
 mathematics (or maths) |
 a ruler |
 PE (Physical Education) |
 a rubber / an eraser (US) |
 a protractor |
 a pencil sharpener |
 IT (Information technology) |
 a desk and a chair |
 a class |
 chemistry |
 physics |