A super bear is a whole lot of gummy bear. Scholars hone their estimation skills by completing an activity. Given the masses of a mini gummy bear and a regular gummy bear, they must determine the number of each needed to have the same mass as a super bear.

Concepts

mass, comparing amounts

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Additional Tags

math

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Instructional Ideas

• Have a contest to see which classmate can guess the closest number before doing any math
  

Classroom Considerations

• A free PBS account is necessary to access the interactive
• Requires some items of different sizes, such as small and large marshmallows
• One piece of the larger Math at the Core: Ratios series
  

Pros

• Requires participants to explain their reasoning
• Includes support materials for the activity
  

Cons

• None

Common Core

5.MD.A.1 6.RP.A.1 6.RP.A.2 6.RP.A.3.a 7.RP.A.2.a 7.RP.A.3