In Lesson 21, students apply their understanding of magnetic force to explain another force that can act over a distance— electric force. They also update the anchor chart and apply their new ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Students begin Lesson 5 by observing shadows changing length over time, leading them to wonder about the relationship between the appearance of shadows and the position of a light source. Students ...