I used this book when I taught 4th grade & loved it!
4 BIG Posters and Dozens of Brain-Boosting Reproducibles for Developing Logic and Problem-Solving Skills
What better way to teach your students an understanding of logic and develop essential math skills than with motivating puzzles! They'll acquire confidence as they develop and apply strategies to solve a variety of logic problems. Includes four big, colorful posters and dozens of reproducible activities. Geared to the NCTM standards.