Mystery Jars
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Contributed By
- Original Source:TERC
Conditions of Use:None Specified
Description
This activity puts a mathematical twist on the familiar “guessing jar.” No guesses allowed, estimates only. Choose an object that comes in two sizes, such as large and mini pompoms, and fill one of two identical jars with each. Ask children to estimate how many in each jar and to write down their reasoning. Encourage them to read what each other has written and decide if they agree or not. If you must give prizes, give them out for good explanations of reasoning, but not for the closest answer. It’s estimation strategies that count. Available as a web page and downloadable pdf. Less
Learning Registry Activity
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Topics and Grades
Grade: TK/K to 9
Topics: Mathematics, Writing Strategies, Number Sense, Area & Volume, Measurement & Tools, Algebra & Functions
Resource Pedagogy
Resource Type/Classification:
- Teacher Materials
- Interactives
Tool for: Students