The following chart is an example that illustrates how problem-solving strategies progress as students move up through the grade levels. To create this chart, both mathematics content and processes were developmentally sequenced within a particular grade level; next, they were articulated and coordinated between grade levels.
The numbers within the boxes on the chart represent the recommended (approximate) number of lessons for each grade level within each problem-solving strategy. LT4 stands for "Lesson Type 4." It refers to a lesson in which a particular strategy is not highlighted, but students can choose from a number of options when solving the problem. This type of lesson is commonly known as a mixed practice lesson.
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