Evan-Moor Daily Higher-Order Thinking, Grade 2, Homeschooling and Classroom Resource Workbook, Brainteasers, Critical Thinking, Problem Solving, Logic Puzzles, Language Play, Drawing

I use these in class as a morning warm-up for my students. They're not too challenging (which I like), but challenging enough to get them thinking and problem solving first thing in the day. They only take a few minutes to complete, and my students really enjoy working together to solve each problem. They also enjoy sharing their answers and thinking/reasoning with the class.