Page 231 - NUMINO TG_3A

Challenge Race
jOb ective Learn the concept of line symmetry.

1. Textbook Instructions Challenge Race

Have students learn more about the line of 1 . The characters are drawn on a transparent film. If the film is folded
symmetry.
along the finish line A, find the order in which they cross the finish line.
1. Have students use a transparent film to
figure out who will cross the finish line first. What you need: Character Race (A8)

Using line A as the finish line, the order of A
their arrivals are as follows. This order can
be seen more clearly when you fold the
transparent film along line A.

A

Thomas Kate Ricky Jessica

Order: Kate, Ricky, Thomas, Jessica

Jessica Thomas Ricky Kate

Fold the film to check your answer.

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2. Build Understanding

Students can measure the closeness of each character from line A to find the order of their arrivals without

folding the transparent film. A

Have students count the number of units from line A to Ricky
each character. The distance is further away from the 4
finish line if there are more number of units. The character,
who is further away from the finish line will arrive later than Thomas Thomas Jessica Jessica
the others who are closer to the finish line. 7 11
Therefore, Kate who is touching line A will arrive first, and Kate
followed by Ricky, Thomas, and Jessica. Ricky

214 NUMINO Teacher s Guide