This classroom resource for Level 1 provides effective, research-based strategies to help teachers differentiate problem solving in the classroom and includes: 50 leveled math problems (150 problems total), an overview of the problem-solving process, and ideas for formative assessment of students' problem-solving abilities. It also includes 50 mini-lessons and a student activity sheet featuring a problem tiered at three levels, plus a Teacher Resource CD with electronic versions of activity sheets is also included. 144pp.