Magazine article Mathematics Teaching

# Tens Chart

Magazine article Mathematics Teaching

# Tens Chart

## Article excerpt

Tens chart

This resource is taken from the new ATM publication Mathematical imagery.

Saying number names

The tens chart (also known as the Gattegno chart) can have fewer or more rows, including or excluding decimals. This can be varied according to the class being taught. The activities below can involve whole-class chanting or be part of grouped or individual work.

Learn the names of the numbers 1 to 9.

Point at 7, ask the class to say it. Then point at 700 (you may or may not need to tell them it is 'seven hundred'). Repeat, pointing at 3 and then 300. Then 9 and 900. Continue until pupils have a sense that numbers in the hundreds row have the name of the initial digit followed by 'hundred'. Count up in 100s from 100.

Following from above... what is 3 + 2? What is 300 + 200? Repeat with other additions or subtractions.

Repeat as with 'hundred' but going from 7 to 7000 to introduce the 'thousand' row. Activities above can be repeated with thousands.

Point to 6000, then 300 and then 5 to get class saying "six thousand, three hundred and five" (you may need to introduce the "and"!). Point to other combinations and get the class to say them. Get someone to say a number and someone else to point to the number in the chart.

Start with 7 and then go to 70 (to get them saying "seven-ty"). Then 6 to 60, 8 to 80 and 9 to 90. Use these 'regular' ones to establish saying "-ty" after the initial digit. You have a choice whether to stay with regularity and temporarily say "one-ty", "two-ty" etc., or to introduce irregularity (e.g, "ten","twenty").

Point at 6, then tap up two rows to point to 600 (they say "six hundred"). Then point to 6 again and tap down two rows to point to 0.06. This is said"six hundredths" (do not say "nought point nought six" as connections between the number names is wanted, along with a sense of place value within the number name). Repeat for other starting digits between 1 to 9. …

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