The grade 9 Geography class at Oakville Trafalgar High School remeasured the trees in their P4C plot. Most trees are now considered mature (>4cm in Diameter at 1.3m) as the plot was planted in 2008. Students learnt how to use clinometers to measure the total height of the trees and how to read a tan table.

In the Spotlight: Celebrating ACER’s 2026 CSJ Tree Inventory Specialist Team!
September 2026. This past summer, ACER had the pleasure of mentoring Canada Summer Jobs students once again—six in total, ranging in age from just entering



