This is a light, fun way to introduce or review multi-step equations. I designed this activity as a lesson for a Pre-Algebra class. However, it would well as an introductory lesson for an Algebra course, a quick review, extra credit, or as emergency sub plans.
I us this activity as classroom notes, calling on students to explain how to solve each of the problems. We work through the entire sheet together as a class (to ensure that ALL of my students have the correct answers) prior to solving the puzzle. Then I help the students begin the puzzle and allow them to finish it for extra credit.
My students really get into this lesson as they like the challenge of trying something new. The problems and the puzzle are not overly challenging, so it allows lower level students and those who are new to problem solving an opportunity to feel a sense of success and accomplish a significant task.