proportionalPairsYC (whole class)

This is currently made for whole class use, so each layer has a teach-learn and practise-learn and then additional shorter TL and PL to be done the next lesson and spaced out over the next few days/weeks.

sample Q from each layer	teach-learn questions
layer	1	2	3	4	5	6	7	8	9	10	11	12
practise-learn worksheets
print hints		d/s
TL reminder + PL w/s B
TL reminder + PL w/s C
TL reminder + PL w/s D