Primary Standards:
MAFS.2.MD.4.10 Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a bar graph.
Connecting Standards:
MAFS.2.OA.1.1 Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
Content Knowledge:
In 1st grade, students gathered and generated their own unique data based on interest surveys or other informal collections. They displayed this data in tables or in other creative ways. In 2nd grade, students will continue to work with similar data as they display this data in simple picture and bar graphs. Students in 2nd grade mostly work with picture and bar graphs with keys and scales of one.
Picture graphs use symbols to show each item, with each symbol representing an item. In bar graphs, students learn to display the data in either vertical or horizontal bars, with each bar representing a category and the height or length of the bar representing the number of items in that category. In 2nd grade, limiting the categories to four or fewer allows students to explore graphs without an overwhelming amount of data.
GCG 1: Learning Goal: As a mathematician, I can Interpret the data from a picture graph by solving put-together, take-apart, and compare problems
- Step 1: Collect and organize data in a table
- Step 2: Create simple picture graphs from existing data
- Step 3: Interpret the data from a picture graph by solving put-together, take-apart, and compare problems
GCG 2: Learning Goal: As a mathematician, I can Interpret the data from a bar graph by solving put-together, take-apart, and compare problems