Algebra Equation Puzzles

This set of challenge equation puzzles offers a fun approach to building problem-solving and algebra skills.    You can also use these when teaching substitution or the transitive property. They are designed to help students build skills needed for solving systems of equations, even if they have never heard of systems before! They will be using substitution and the transitive property mentally, whether they know it or not.   3 difficulty levels are included. Use the different levels for easy differentiation or for building upon the skills and increasing the challenge level as you go: - basic (easy) cards that can be used before or during middle school grades for critical thinking - medium level cards that are perfect for middle school or high school students - difficult cards that offer a challenge, even for high schoolers   7 themed sets are included: - Halloween (8 cards) - Thanksgiving (12 cards) - Christmas (12 cards) - Valentine's Day (12 cards) - St. Patrick's Day (12 cards) - Ea