Teach problem solving! The 24 lessons in this unit are designed to help students turn abstract problems into graphic, semi-concrete formats. This ability is an important step in the development of effective problem-solving techniques. Example: Planted four rows of flowers. Six plants in each row. How many flowers? Draw a picture to show how to solve each problem. By creating a visual representation of the components of a problem, students can more easily perform necessary operations. They can also see the logic or absence of logic in their solutions. The sequential activities featured here will most certainly help young learners develop critical thinking skills.