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Abacus (1)
ABACUS (1)

Definitions:

i. A frame with small balls which slide along wires. It is used as a tool or toy for counting.

ii. An abacus is a frame used for counting. It has rods with sliding beads on them.
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* All six elements should be in.


1. Purposeful and necessary.

2. Strongly built or solidly made.

3. Has enough number of beads for the mental age of user.

4. Features such as colours, sizes, etc. of beads will aid learning.

5. Serves purpose(s) for the learner, as exactly hoped for.

6. Frame will have no foreign object on, when being used.
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