Help your students practice measuring twice with fun, engaging BOOM™ cards! Students will measure using inches and centimeters to find the difference in length of two objects. This deck includes 30 cards perfect for practicing second grade standard 2.MD.4. Multiple card types provide a variety of practice.BOOM™ cards are self-checking task cards that provide immediate student feedback. BOOM cards can be used on interactive white boards, desktops, chrome books, laptops, iPads, iPhones, Kindle Fir