If you keep a fish tank in your classroom or somewhere in the school, you may be missing out on an opportunity to teach a simple Earth Day activity about biodiversity and aquatic habitat. Provide a simple integrated vocabulary reinforcement activity for your multi-age or 1st year language learners (Appropriate for elementary and above, Immersion and Heritage Speaker. One to three-day activity options to complete in-class or at home). Included (For print-based and digital activities with options