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While outdoors, the teacher hears the children talking about equipment at a construction site behind the playground.
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| Wow! Look at that bulldozer. | |
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| My dad wears a hard hat and builds things. He drives a backhoe. | |
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Back in the classroom, the teacher uses the interest of the children to determine what they know about the topic. "I wonder what those big vehicles are for behind our playground?"
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| My dad told me the backhoe has a digger bucket like this. It is used to dig in the dirt. | |
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| I like the big bulldozer. It is better than the backhoe. | |
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The teacher documents the conversations of the children and decides the next project will compare and contrast backhoes and bulldozers. She gathers props to add to art, blocks and dramatic play.
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| The bulldozer has big tracks, not little tires. | |
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| The backhoe doesn't have little tires, it has big tires. Workers need backhoes and bulldozers. | |
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