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2-D-1-3

Page history last edited by Tashe Harris 6 years, 7 months ago

2.D.1.3 Write and solve one-step word problems involving addition or subtraction using data represented within pictographs and bar graphs with intervals of one.

In a Nutshell

In second grade, students will use data from a pictograph or bar graph and write and solve addition or subtraction word problems. In third grade students will be expected to write and solve one- and two-step problems using categorical data.

Student Actions	Teacher Actions
Develop a deep and flexible conceptual understanding by analyzing data in bar-type graphs and tally charts. Communicate mathematically about the information gathered and displayed. Develop mathematical reasoning when interpreting data from pictographs and bar graphs. Develop a productive mathematical disposition by applying the knowledge gained from a collection of data to write and solve one-step word problems.	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 student in a discussion about the meaning of data. Facilitate meaningful mathematical discourse of students’ ideas. Support productive struggle by allowing sufficient wait time so that students can formulate and offer responses, and ask questions. Implement tasks that promote reasoning and problem solving by adding to, taking from, putting together, taking apart, comparing, and with unknowns in all positions.
Key Understandings	Misconceptions
Titles and labels are important in understanding data displays. Data from graphs can be used in everyday life Addition is used to join sets, subtraction is finding the difference between sets Students must know how to write a number sentence. Students need experience working with addition and subtraction to solve word problems which include data.	Student might think addition and subtraction are interchangeable. Students may not read the scale correctly. Student may assume all units equal one (Example: One square = 5 people) The column/row with the most is the winner.