California Foundation for Agriculture in the Classroom provides free K-12 teaching resources available for free downloading at LearnAboutAg.org (lesson plans, fact sheets, student newspapers and more). California educators can request print copies, shipped at no expense.
The Plant Science lesson plans (http://learnaboutag.org/resources/learn_plant.cfm) help students discover what plants need to grow through hands-on lessons and activities: Fun with the Plant Nutrient Team (K-3), What Do Plants Need to Grow? (2-4), Too Much? Too Little? (5-8), and Chemistry, Fertilizer, and the Environment (8-12). All resources are aligned to current California Standards. The organization also provides an annual teacher conference (July 14-15, 2017) and the Imagine this… Story Writing Contest for grades 3-8 (November 1 annual deadline). Learn more and request free resources at LearnAboutAg.org.