Point at the tens to 100 and say them aloud. Ask students to repeat the numbers after you. Next practice a selection of numbers to 100. Point out that when saying the number, you always start with the ten-fold (twenty-, thirty- forty- etc). Explain how to write the numbers using 79 and 97 as examples. They can be mixed up. Ask students to practice writing numbers. Can they point out the correct answer? Check answers by dragging the boxes. Next practice by saying a number at random and asking students to circle the spoken number.
Check that students have understood by asking the following questions:
Where might you see or find these numbers?
Can you give an example? (speedometer, products, scale)