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In this self-measuring activity, learners observe and record how many times a minute they blink, take a breath, and chew, as well as how many times a minute their heart beats.

1 cent - $1 per group Ages 4 - 14 30 to 45 minutes
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In this activity about how the body regulates blood pressure (page 117 of the PDF), learners make and compare measurements of heart rate and blood pressure from three body positions: sitting, standing

1 cent - $1 per group Ages 8 - 18 30 to 45 minutes