Theory:

     The Inspector had smiled after he was finished and patted Margie’s head. He said to her mother, It’s not the little girl’s fault, Mrs Jones. I think the geography sector was geared a little too quick. Those things happen sometimes. I’ve slowed it up to an average ten-year level. Actually, the overall pattern of her progress is quite satisfactory.” And he patted Margie’s head again.
 
     Margie was disappointed. She had been hoping they would take the teacher away altogether. They had once taken Tommy’s teacher away for nearly a month because the history sector had blanked out completely.

     So she said to Tommy, “Why would anyone write about school?”
Explanation:
 
The County inspector patted Margie’s head and said to her mother that she was not securing good marks in Geography because the machine was not working properly. It was made to a higher grade. He said that sometimes machines did not function properly. He had slowed it down and set is to the pace of ten-years of age. He said that Margie was learning well. He again patted Margie’s head to encourage her.
 
Margie was not happy because she did not want to study from the machine. She hoped that the Inspector would take the computer with him. Margie is reminded of the time when Tommy’s Mechanical teacher had been taken away for repair for almost one month, and he was enjoying his time as he didn’t have any teacher. It had been taken away because a portion of the History subject had been wiped out. So, the mechanical teacher did not have any memory of it and had to be taken away for repair.
 
Now we know the reason for Margie’s dislike for school. So, she asked Tommy why would anyone write about school.
 
Meanings of difficult words:
 
Numbers
Word
Meaning
1.
Geared (to)
 Adjusted to a particular standard or level.
2.
Blanked out
It has been erased.
Reference:
State Council of Educational Research and Training (2018). Term-1 English Standard-9. The fun they had - Isaac Asimov (pp. 150-153). Published by the Tamil Nadu Textbook and Educational Services Corporation.