In Topic A, student work revolves around categorical data, which is produced by sorting objects or information into categories. In Lesson 1, working within a science context, students categorize animals into classes (mammals, birds, fish, and reptiles), organize them in the form of a table, and then use the category counts to solve simple put-together, take-apart, and compare word problems (2.MD.10). In Lesson 2, students learn to draw and label a picture graph using the data from Lesson 1. Grid paper provides support as students construct these graphs. Following the same procedure and using the same data as in Lesson 2, students learn to draw and label a bar graph in Lesson 3. In Lesson 4, students continue working with bar graphs to represent new data sets and solve simple word problems. Topic A culminates in Lesson 5 as students display money data in a bar graph and use this data to solve word problems. This leads into problem solving with coins in Topic B.
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