Should I connect to 195 external data (excel files)?

[rachapol]

Hi I am new to power queries. I am a teacher and try to accumulate all the score for the whole school.

I have 15 subjects and each subject have 15 classes to pull the score in.

My goal is to be able to receive all the subject scores for each classes(15 sheets in 1 excel).

Something like this.
Sheet 1 Class 1
[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD]Name[/TD]
[TD]Subject 1[/TD]
[TD]Grade[/TD]
[TD]Subject 2[/TD]
[TD]Grade[/TD]
[TD]Subject 3[/TD]
[TD]Grade[/TD]
[/TR]
[TR]
[TD]Student 1[/TD]
[TD]70[/TD]
[TD]B[/TD]
[TD]80[/TD]
[TD]A[/TD]
[TD]40[/TD]
[TD]F[/TD]
[/TR]
[TR]
[TD]Student 2[/TD]
[TD]80[/TD]
[TD]A[/TD]
[TD]70[/TD]
[TD]B[/TD]
[TD]50[/TD]
[TD]D[/TD]
[/TR]
</tbody>[/TABLE]

Sheet 2 Class 2

Sheet 3 Class 3