I am ordering this abacus for my fourth grade student who is having good success with my own ALabacus. He is in Special Ed. and doesn’t know the addition facts. He caught on immediately, after one demonstration from me, to trading beads on the abacus to make tens. Several days later, when I was showing his mother how it helped him, I asked him to add on it 9+9. He did the trading in his head and, without hesitation, pulled over 10 beads and 8.
He’s one of those children who have huge difficulty with language and math, but can put a bicycle together on their own.
Thank you so much, Joan Cotter, for having such good ideas and sharing them.
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