1. chalkboard = blackboard

2. screen

3. whiteboard

4. teacher / instructor

instructor
a teacher below the rank of assistant professor at a college or university

5. student

6. LCD projector

projector
a piece of equipment that makes a film or picture appear on a screen or flat surface

7. desk

8. headphones

A. Raise your hand.

B. Talk to the teacher

C. Listen to a CD.

D. Stand up.

E. Write on the board.

F. Sit down. / Take a sit.

G. Open your book.

H. Close your book.

I. Pick up the pencil.

J. Put down the pencil.