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Estimation Exploration

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  • DOMAIN(S)
    Cognitive Development and General Knowledge (CD)
  • INDICATOR(S)
    CD-MA7.4a
  • AGE GROUP(S)
    48-60 months

Put about 20 seashells or other objects in a jar bowl or pile. During large group, encourage the children to observe how full the jar or bowl is or how big the pile is. Remove 10 items from the group. Doing this gives the children a visual idea of what 10 shells looks like and helps them make more accurate estimates. Then put the shells together again. Remind children that there are at least 10 in the jar, bowl or pile and to think about what 10 looked like. Encourage the children to estimate how many shells there are altogether. Write down the estimates. Count together to check the estimates. Repeat with a similar number of a different objects to give the children more experience with estimation.

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