Curated OER
Food Webs
Fourth graders discover how organisms depend upon each other in an ecosystem. In this ecosystems lesson, 4th graders use food webs to discuss the interdependence between organisms in an ecosystem.
Curated OER
Base 3
Students investigate this problem that aims to give a better idea of our decimal system by looking at a comparable system - the base 3 system. By seeing how base 3 numbers work students should have a better appreciation of base 10...
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