Grades 4-6: Lichen

by | Feb 24, 2026

On page 21 the author writes that scientists test lichen on city trees to monitor pollution. Watch this video https://www.youtube.com/watch?v=lh3xFOw62aU about why lichen is important. What did you learn about the value of lichen to us and the environment?

Grades 4-6: Under the City

by | Feb 24, 2026

On pages 14–15, you’ll notice tree roots competing with pipes underground. Watch this video about what New York City looks like underground https://www.youtube.com/watch?v=SX1xmaKPb9o. What do you think is under your city? Is it the same or different?

Grades 4-6: Building Communities

by | Feb 24, 2026

On pages 12–13 the author talks about something called the Wood Wide Web. Watch this YouTube video https://www.youtube.com/watch?v=yWOqeyPIVRo and consider how trees and people are similar and different in the way they build communities.