I wanted the kids to get a good idea of the importance of healthy blood pressure, so we did a little project in class involving straws. Having the two different-sized straws allowed them to see how liquid flowed more freely in the larger one than in the smaller, more constricted one – much like our blood vessels.
We also checked our blood pressure using a machine another parent brought in, and I gave them a chart, so they could see how they measure up. These went in their lapbooks.
For this project you’ll need 4 cups, a skinny straw (regular), a fat straw (like the ones for milk shakes), modeling clay, liquid food coloring, a stir stick, water, some kind of tray (or do it outside), and an Exact-o knife.
On two of the cups, about a half-inch from the bottom, and using the Exact-o, make an X.
Have the kids shove the two straws into the X’s, and then put modeling clay on the inside and outside of the cups, around the straws, to prevent leaks. At this time, they can also fill the other two cups with water, add the food coloring, and stir.
Dump the colored water into the cups with straws at the same time to see the difference between the sizes of the straws, or blood vessels.
Below you’ll find our lapbook parts for blood pressure. The rest of the lesson can be found here.
L8 Lapbook – Blood Pressure Chart
L8 Lapbook – My Blood Pressure