character: Oscar the Grouch
topic: Classifying Objects by Weight
grade: 1
subject: Mathematics
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character: Elmo
topic: Comparing Object Weights
grade: 1
subject: Mathematics
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character: Big Bird
topic: Understanding Heaviness and Lightness
grade: 1
subject: Mathematics
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character: Cookie Monster
topic: Sorting Objects by Weight
grade: 1
subject: Mathematics
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