Mathematics discovery
Linear Lab: Choose the next train when one block is added each time.
Notice constant additive change in a concrete growing pattern.
A growing pattern can change by any amount at each step and keep one rule.
Have the learner place the one new block beside each step to expose the constant change.
CCSS.MATH.1.OA.C.5 / CCSS.MATH.2.OA.C.4
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