How much negative feedback does a body get daily? The interactive walks through one negative feedback loop, increasing body temperature. Then it challenges scholars to relate this to mechanical feedback loops and disorders that prevent...

Fourth graders watch a video about reading a gas meter and discuss what they saw in the clip.  In this place value lesson, 4th graders complete a worksheet where they fill in the missing dials on the meters. 

Fourth graders read gas meters to measure cubic feet and learn place values. For this place value lesson, 4th graders watch a video about meter reading and discuss place value on the gas meter dials. Students study a related chart and...