Developmental Gain Report B has the following 6 distributions
2+ below: 2 or more years below
1 year below: Equal to or more than 1 year below but less than 2 years below
below: More than 1/2 year below but less than 1 year below
on grade: 1/2 or less below and 1/2 or less above
above: More than 1/2 above but less than 1 year above
1+ above: 1 year or more above
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