Bonnie L. Risby 
Logic Countdown [PDF ebook] 
Grades 3-4

This classic series will excite students” imaginations while enriching skills in logical thinking.
Logic Countdown problems are easy to incorporate into lesson plans and are formatted to enhance the fullest spectrum of curriculum areas while sharpening thinking skills. Challenging and instructional, these thought-provoking books present sequential exercises in logical reasoning that include relationships, analogies, syllogisms, sequences, deductive reasoning, inference, truth-values, and logical notation. Simple grids coupled with intriguing problems evoke enthusiasm and inspire students to higher and higher levels of thinking. Each book builds on concepts presented previously in the series to offer a comprehensive logic adventure for young thinkers.
The skills students build by using this book are applicable to several areas of the curriculum. Academic skills used for reading, math, writing, and science all depend on the ability to perceive and define relationships and to form inferences. But, beyond the academic world, students will find logical thinking an integral part of everyday life.
This is the first in a three-book series designed to sharpen children”s logical thinking skills. Once students master the skills presented in this book, they will be ready for new challenges in
Logic Liftoff and
Orbiting with Logic.
Grades 3-4