Browse resources Displaying 1 - 1 of 1 resources Photo: Kimberly Jacobsen (Cropped from original) After COVID-19 cuts down in-person Tree School, event re-grows online The first Tree School Online session debuted with 300 registered participants. Since then, the live classes have rolled out with anywhere from 50 to 100 participants. Jim Sloan | Jun 30, 2020 | News story