Back to School, End of Year, First Day or First Week of School Activity. Elementary and Middle School Differentiated. Want to get your students excited about math and impress them? Check out these Math Magic Tricks that always work! Let them wonder, then reveal the secret, and let them become the magicians. Differentiated versions include: multi-digit operations, fractions, or decimals. The Unbelievable 25 Challenge. Every number you start with seems different: random, unpredictable, unique.