We began by watching a short video about measurement and the students coming up with a definition for weight. Then students took a marker and found objects in the classroom they thought were heavier, lighter, or the same as. We began by just holding one object in each hand and making comparison using heavier, lighter, or the same as. Then the next day, we got out the balance scales and discussed the purpose of the scale. This time each student choose 1 item from the classroom. At their tables they decided which two objects, they would hold and share their prediction. Then they put them on the scale to see if they were correct. Then they repeated with the last two. They recorded the actual results in their math journal. Then they switched objects with a different table.
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