PUNCHLINE Bridge to Algebra • 2nd Edition 
understanding of these concepts, including investigations, openended problems, creative projects, writing, and group problem solving. An important adjunct to these methods is the use of carefully structured and sequenced sets of practice exercises. Students construct meaning as they work through them, and retention is enhanced. Certain features are designed into Punchline puzzles to make this practice more effective. KNOWLEDGE OF RESULTS. Students need feedback and confirmation when they work, especially when learning new skills. Built into Punchline puzzles are various devices for giving the student immediate feedback as exercises are completed. For example, if an answer is not in the scrambled answer list or code, (s)he knows it is incorrect. The student can try again or ask for help. Teachers are able to spend more time helping students who need help and less time confirming correct

answers. Students work with greater confidence. MOTIVATING GOALS FOR STUDENTS. What Did Scientists Conclude After Discovering Bones on the Moon? Each puzzle title is an engaging riddle. Students construct the punchline in the process of checking their answers. The humor acts as an incentive, because students are not rewarded with the punchline until they complete the exercises. While students may wonder aloud who thinks of such dumb jokes, they secretly enjoy them and look forward to solving the puzzles. In addition, discovering the punchline gives the student a sense of closure and success. Incidentally: "The cow didn't make it." Punchline Bridge to Algebra includes puzzles for most topics in today's prealgebra and beginning algebra programs200 puzzles in all. They are organized into 14 sections that correspond to chapters in many textbooks. Each puzzle is designed for a specific topic listed in the Table of Contents and on the puzzle itself. Many puzzles provide space for student work. And, hopefully, their selfcorrecting feature will lighten the burden of correcting assignments.
