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2-D-1-2

Page history last edited by Tashe Harris 6 years, 2 months ago

2.D.1.2 Organize a collection of data with up to four categories using pictographs and bar graphs with intervals of 1s, 2s, 5s or 10s.

In a Nutshell

In previous grades, students collected, sorted, and organized data in up to three categories using representations such as tally marks, tables, and Venn diagrams. The picture and bar-type graphs they used demonstrated a one-to-one correspondence. In second grade, students will sort a collection of items up to four categories using pictographs and bar graphs. These graphs will demonstrate intervals of 1s, 2s, 5s, or 10s. In third grade, students will build upon this knowledge, constructing various types of graphs with scaled intervals.

Student Actions	Teacher Actions
Develop a productive mathematical disposition when answering questions and gathering data about themselves and their surroundings./model data using pictographs and bar graphs. Communicate mathematically by describing and comparing categories of data. Develop accurate and appropriate procedural fluency by adding titles and labels in intervals of 1s, 2s, 5s, or 10s.	Use and connect mathematical representations by creating real-world experiences for data collection that have meaning for students (favorite snack, pet, etc). Pose purposeful questions to engage students in a discussion about the meaning of data, such as: “Why do people collect data? Are there different ways to display data? What can we learn from our data?” Build procedural fluency from conceptual understanding of using a collection of data and creating a pictograph or bar graph. Support productive struggle by helping students organize, record, and communicate their thinking in a pictograph or bar graph.
Key Understandings	Misconceptions
In order to formulate questions and decide how to represent data that have been gathered, decisions must be made about how things might be categorized.	Data can go in any category on a graph. The category with the greatest quantity is the “winner”. Titles and labels are unimportant and can be ignored.