3V1275.1

3V1275.01 Computer “rods” (7/20/81) Seeing the trouble she had with the rods always falling over, I asked is a Rods microworld would be easier to manipulate and thus intellectually more accessible to her. So I proceeded to make one, substituting (a later idea) the blinking of numbers in place of partial blanks — that is …

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3V1267.1

3V1267.01 Computer-based cuisenaire rods (7/12/81) Peggy enjoyed playing with the Cuisenaire rods during out experiment P181. Either in that one or the next P182, Peggy first accomplished a set of “stairs.” After the end of the experiment, she continued playing with rods and I heard her mention (at a point where she omitted the 3-length …

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3V1155.1

3V1155.01 Cuisenaire rods: playing with them after experiments (3/22/81) Guessing games Peggy had used Cuisenaire rods in the immediately previous videotape. Somehow she got hold of them again and I became aware that she was laying them out [Bob had, I think, tried to see if she would build a “stair.”] As she did so, …

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3V1084.1

3V1084.01 Counting Irregularities (1/10/81) Peggy “counts,” ie. recites the number names in a quasi-standard fashion. (omitting “seven” more often than including it.) Although she has put objects in one to one correspondence, she has not done so successfully in the standard sense. She counted on her fingers today showing no non-standard variations. First she counted …

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3V1058.1

3V1058.01 Counting objects: near standard sequence with omissions (12/13/80) Miriam and Peggy went to visit Mrs. Smith. She keeps toys in her house for children she takes care of. Peggy selected a ring pyramid and Miriam (as she later tells the story) inverted the rings. Peggy began re-stacking the ring and spontaneously reciting number names: …

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3V1010.1

3V1010.01 Playing with coins: progressive discrimination (10/26/80) After P143 (where we played with many coins) Peggy found the pile of change and asked me to join her in playing with them on the floor. As we did so, Peggy separated them and said, “I’m picking the big pennies out and putting them on the floor.” …

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