Ag in the Classroom has great e-learning resources for junior & senior high school students! Check out some of these options:
Journey 2050 – A virtual farm simulation that explores world food sustainability. Students explore how to sustainably feed the world’s growing population by 2050. Once you register as a teacher, your students can enter your teacher code before playing each level and the game will generate a student report.
Illinois Ag in the Classroom has Terra Nova readers available online for a variety of subjects. These full color readers offer a great resource for Math, Science, Social Studies, Language and Writing in a nonfiction text.