point to things near/far from you. Make sentences using this/these, that/there.
A:(points to the rules)
B: This is a ruler.(points to the blackboard) That is a blackboard.

A:(points to the rules) B: This is a ruler.(points to the blackboard) That is a blackboard. A:(points to the door)B: That is a door. (points his nose) This is my nose.