# 3.MD.B.3

Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories. Solve one- and two-step “how many more” and “how many less” problems using information presented in scaled bar graphs. For example, draw a bar graph in which each square in the bar graph might represent 5 pets.

## Summary:

This standard focuses on the students’ ability to read and interpret sets of data that have been displayed in an organized and categorical manner, such as a bar graph or a pictograph. Such a skill also incorporates a student’s ability to generalize information, count data sets on a graph, and perform simple computation operations that will yield a greater variety of information about the data.

## Understanding the Standard:

• Provide a variety of opportunities for students to categorize objects or other data sets in the world around them. Such activities might include sorting shoes, personal attributes (e.g., hair color, eye color, boys and girls), ways they get to school, favorite color. Once the sets have been determined, guiding students to participate in displaying the information in a visual graphic is helpful.
• Students need to be able to compare two sets of data and then use a third set to help make a generalization. Upon mastery, students can then use numerical references of the data to compare using addition and subtraction.

## Questions to Focus Instruction:

• What everyday experiences or objects can be used to create a data set for visual display?
• Can students identify or create the title of a graph?
• Can students identify the sets of data that are being represented and communicate their relevance to the title?
• Can students create a scaled graph that accurately represents the data set?
• Are students able to use addition and subtraction to compute relevant information in the graph?

## Skills

Prior to: In addition to reading and interpreting bar graphs and pictographs, students will create their own graph in order to display a set of data. Furthermore, they will decide if a given graph is displaying the data information correctly. Go to 2.MD.D.10 to see previous skills in this progression.