Annenberg Learner, in connection with Harvard-Smithsonian, has developed an online program for educators called Essential Science for Teachers: Life Science. The Plants lesson features an excellent overview video and study of botany that will benefit all K-6 teachers.
If you have access to ipads or tablets for your classroom, PBS Kids Scratch Jr.has an activity for primary-grade teachers that combines botany education with computer literacy. Students learn about what plants need as they grow their own digital plants.
Lesson Plans and More
For early childhood and K-1 educators, Plant Life Teacher's Guide is a treasure. It includes background information and 16 hands-on learning experiences involving seeds, plant parts, growth, flowers, and human use of plants. If you teach younger students, you will want to check this out.
The US Forest Service has terrific resources and detailed lesson plans on flower parts, pollinators, and the importance of plants to humans, with extensions, worksheets, and downloadable visuals.
Take a look at this lesson on plant parts for K-2 students from the American Association for the Advancement of Science. For 2nd and 3rd grades, find lesson plans on seeds and plant needs. For grades 2-5, see this photosynthesis lesson plan, slideshow, and song.
Smithsonian in the Classroom has a complete lesson plan on pollination and the vital partnership between plants and bees. University of California offers Flight of the Pollinators, a fun, hands-on activity where students take on a pollinator's perspective, adopting the role of a bee, moth, butterfly, or hummingbird.
Plants: A Collection of Teaching Resources from Scholastic features several lessons to help K-5 students study the structures, varieties, life cycles, and uses of plants, seeds, flowers, and trees. For example, From Seed to Plant for grades K-2, has lessons on exploring seeds, dissecting plants, and investigating the plant-based products we use. For grades 3-6, check out Plants: 11 Study Jams, which features 11 videos with interactive activities on photosynthesis, flowers, angiosperms and gymnosperms, and plant adaptations. Your students will love these!