Review what students have learned about materials with the BOOM CARDS Recycling Sort! With this sort your students can prepare for Earth Day by deciding whether to recycle, throw away, or place each item in a compost bin. Boom Cards are digital task cards. The best part is they provide your students with INSTANT feedback! They work on an iPad, Chrome Book, Kindle Fire, other devices, or even your phone! Boom Cards also can be used on your Smart Board and make for a fun engaging way to review.