They're clocks
It's a clock
They're chairs
It's a chair
They're pencils
It's a pencil
It's a book
They're books
She's a student
They're students
It's a classroom
They're classrooms
It's an eraser
They're erasers
It's a ruler
They're rulers
They're books
It's a book
It's a chair
They're chairs
They're lessons
It's a lesson
They're teachers
She's a teacher
They're clocks
It's a clock
It's a classroom
They're classrooms
They're rulers
It's a ruler
It's a board
They're boards
It's a pen
They're pens
They're desks
It's a desk
It's a lesson
They're lessons
It's a pen
They're pens
It's a pencil
They're pencils
They're erasers
It's an eraser
They're students
She's a student
They're boards
It's a board
It's a desk
They're desks
They're teachers
She's a teacher