# foam pieces, tessellatations and a discovery

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We have been playing with cut up foam pieces for a long time now. But recently I came across a few sets of foam created by JodoGyan called Rangometry (www.jogogyan.org).

The foam is thick and sturdy and the pieces lend themselves to endless tessellations and combinations. Initially I let the boys simply explore the sets. They made all kinds of things using the pieces. The set has squares, triangles of two different types, diamonds, and hexagons.

Finally this morning as we were enjoying a chilled out morning in the balcony, I thought of pulling out the rangometry kit. This time we first played a game (an activity I learned about at the JodoGyan workshop called Sajaana). I drew an outline of a bus using a marker on the plexiglass sheet along our balcony railing. Then using a large dice each child rolled, identified the number rolled and picked out the matching number of pieces of rangometry foam which they placed along the outline. (Note: we had poured the foam pieces into a bowl of water. The made them wet and they adhered easily to the plastic sheet we were playing on) Since the twins are comfortable with numbers upto 10 we used a 12 sided dice (dodecahedron) which has numbers from 0-10 (5 is repeated once). It was great because here is what was happening as we played:

1. the kids had to identify the number on the dice face correctly
2. They had to then pick out the corresponding number of foam bits from the bowl
3. They had to then put those pieces in continuation on the outline of the bus (fine motor skills)
4. They quickly figured out bigger and smaller numbers, getting most excited when they got high numbers like 8 or 9 or 10 and a little sad when they got 3, 2 or 1
5. They – especially the 3 yr old got the meaning of zero – it means nothing!! as he exclaimed when he rolled it and could not put anything on the outline. (It is useful to follow JodoGyan advice here – when a kid rolls a zero, do not give him another turn because not giving him another turn allows him to understand and appreciate the value of zero)
6. We got quite a pretty outline with the kids trying to make patterns as they went along.

After we were done with this, I started playing with the pieces and started out a tessellation type design. I found Nish (5 yrs next month) was most interested. He observed carefully while I made pattern and then asked if he could help. With a tiny bit of guidance he started out and then was so fascinated that he went on and on…quickly inspiring his twin to join in too! I had not thought they would get it so easily but it was a pleasant surprise and they totally enjoyed it too!

And, since I have mentioned JodoGyan a few times here – you must check out their website. They have developed a math teaching and learning program preschool up that is pretty incredible. With a strong focus on the child, developmental appropriateness and simplicity, the program is actually very interesting and I would strongly recommend educators – especially in the preschool space to look at it. In stead of trying to cram the preschooler with endless numbers to read, identify and write repeatedly, moving into tens and hundreds and place value and complex operations, the program focuses on making math a concrete and enjoyable fun learning experience where comprehension is key. Given the general experiences in math learning across age groups it is indeed time to stop and look at math learning differently. For schools that are interested – they actually do detailed and very practice based training for teachers who plan top use their materials.

Note – I am not a representative of JodoGyan nor have I been asked to talk about it. However, I have recently come across their material and have been quite impressed – hence sharing this here with you!