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2-D-1-3

Page history last edited by Tashe Harris 6 years, 1 month 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.


OKMath Framework Introduction

2nd Grade Introduction

2nd Grade Math Standards

 

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