3V1184.01 Blocks microworld: Moving Blocks (4/20/81)

Peggy has experienced a number of insights in her developing control of the little blocks microworld. The record of her discovery of “BK” is in P169. This is a significant and meaningful operation for her when the block has a forward velocity. In the case “BK” interrupts the velocity for a jump back, after which continued forward movement goes on. Peggy said (?) this is a “neat phenomenon.”

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