Those are ...
Marker
What is this?
School bus
What is this?
Library
This is an ...
Office
This is ...
Paper
What is this?
Ruler
What is this?
Classroom
What is this?
Playground
What is this?
Computer room
This is a ...
Bathroom
What is she doing?
Painting
What are they doing?
Reading
What is he doing?
Drawing
What is she doing?
Writing
He is a ...
Bus driver
She is a ...
Teacher
