Help young scientists connect with nature and learn about trees with a fun life science lesson. Heading out into the school yard, children choose a tree to adopt, taking measurements, writing descriptions, and drawing sketches of it in their science journals. Perform a series of observations over the course of a month, a semester, or the entire school year to allow the class to experience the seasonal changes trees undergo. This cross-curricular lesson brings together topics in math, language arts, and science and would make an excellent addition to an elementary science unit on plant life.