Excel Offset (sample every nth row with specific values)

I'm deeply confused about using OFFSET with ROW to grab every nth row of a sheet

I have a marking sheet that looks like this:

And am trying to transfer those grades into a summary sheet where each row represents the scores for one student that are spread around the nicely formatted grading sheet

My summary sheet looks like this. In each cell I have entered the row number for each piece of information in the marking rubric.

how would I write the formula to reference these cells for the first column (Identification)? I have tried to use OFFSET($B$5,ROW(A1)*n-1,0) for this, but cannot figure out how to specify it to grab the right rows. e.g. 8, 44, 80, 116, etc.