Question

Why did
3. What did he do?​

Answer 1

Answer:

He slowed down the mechanical teacher's speed up to an average ten-year level. The mechanical teacher's speed was controlled and adjusted according to the IQ level of Margie.

Answer 2

From the story "The Fun They Had".

$:\pink \implies$He slowed down the mechanical teacher’s speed upto an average ten-year level. The mechanical teacher’s speed was controlled and adjusted according to the IQ level of Margie.