What is this?
An eraser.
What's this?
A pencil sharpener
What's this?
A pencil
What are these?
Crayons
What's this?
A door
What's this?
A ruler
What's this?
A chair
What are these / is this?
students / Classroom / table
What's this?
A computer.
Who is this?
Mr. Keith / The teacher
What's this?
A lunchbox
What's this?
A clock