Watch the video:
What do you notice?
What do you wonder?
How many carpet squares would be needed to cover the whole room?
What is a number that you're sure is too small?
What is a number that you're sure is too big?
Notice that the Teachers' Study Room's floor is not a rectangle. It's a kind of L shape:
It looks like, from the plan that this is its shape, measured in carpet tile lengths:
Show your thinking when you work out the number of carpet tiles to cover the room.
Next door is the staff room: