Schoolyard Volunteering
/I volunteered for a pilot program about climate change concepts (carbon capture, water infiltration, urban heat island) for 6th graders held on their own school grounds. It was a positive learning experience for me…and the students as well. Howard County Conservancy held training beforehand so when the first one was held I was relatively well prepared….but the first time through is always tricky. My station was about carbon sequestration; the students measured the circumference of trees on their schoolyard to estimate the weight of carbon in the tree and the weight of CO2 absorbed by the tree. The students became more coordinated with the process as they measured more trees: using a tape measure - 137 cm up from the ground and then measuring the circumference. Teams of 3 worked well (2 for the tape measure and one recording results). Then in the last part of the session we use a table to determine the carbon in and absorbed by the trees.
The second school was an earlier start…out of the house at 7 AM! It was also a cooler day (in the 60s and lower 70s) so more comfortable wearing a mask. The students are mostly too young to be vaccinated yet. I took a quick picture of my front flower bed and the morning sky before I left the house.
My first assignment was carbon sequestration for 2 student periods and then water infiltration for the next three periods of the day. Many of the trees we measured were about the same size – probably planted when the school was built. We learned that even the grassy areas of school yards don’t have good water infiltration – maybe because the mowers used on them are heavy enough to compact the soil! And even the water retention ponds (which were dry during the session) did not let the water soak in. The mulched areas under the trees were the only areas that showed good infiltration. Most of the rain that falls simply runs off rather than soaking in close to where it falls.
There was some break time between periods, and I observed some sparrows taking dust bathes in a bare spot near the edge of the school ground.
Overall – the students seemed to enjoy the program and collected data that they will use in their classrooms. I had my best experiences ever with this age group. Middle school is such a mix of student maturities…but the small groups made it relatively easy to engage all of them and keep them focused on collecting information about their school yard in a consistent, organized way. My lesson learned was that signing up for the full 5 periods is a bit overwhelming…probably won’t do that again!
