Guess what is it

You describe something in your classroom to your partner. You can describe the position, color, shape…But you can't say the name of it, and your partner will guess what it is. Like this model:

Model:

A says: It's in front of the classroom. It's rectangle. The color is black The teacher writes on it.

B guesses: Is it the blackboard?

A: Yes, it is.

Then you two change roles.