Curated OER
Seeing Sound and Sonar
Students grasp how underwater animals can "see" using sound waves. They practice making inferences, and build a conceptual understanding of sonar radar.
TeachEngineering
Teach Engineering: Mercury and Venus
Students explore Mercury and Venus, the first and second planets nearest the Sun. They learn about the planets' characteristics, including their differences from Earth. Students also learn how engineers are involved in the study of...
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