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.