Reflection: Developing a Conceptual Understanding Put It All Together - Section 2: Develop the Concept


During this lesson I quickly learned that students had spent too much time working with the Part/Part/Whole model with subtraction.  When they got to the problems of comparison, they knew to subtract (something they hadn't known before. Yay, progress!) but they continued to use the part/part/whole model instead of thinking about how they could use cubes or draw a comparison model.  

I found that it was necessary to spend a bit more time with determining the difference between separating problems and comparison problems and why you can't use the part/part/whole model.

  Developing a Conceptual Understanding: Putting It All Together Reflection
Loading resource...

Put It All Together

Unit 1: Addition and Subtraction Basic Training
Lesson 7 of 7

Objective: Students will be able to determine the correct mathematical operation for a word problem, write the number sentence, and solve the problem.

Big Idea: As mathematical thinkers we must use the information from a real world problem and determine what is the correct method to solve the problem.

  Print Lesson
25 teachers like this lesson
screen shot 2013 12 05 at 9 28 37 am
Similar Lessons
A Grinchy Christmas
1st Grade Math » Properties of Addition and Subtraction
Big Idea: This Grinch inspired lesson pushes 1st graders to attempt 2 part story problems. It also is a great way to introduce the topic in 2nd grade!
New Orleans, LA
Environment: Urban
Amanda Cole
Math Hunt Part 2
2nd Grade Math » What and Where is Math?
Big Idea: Students have gathered data on where math is used both at school and at home. Data by itself is meaningless. The students will be introduced to using the data to answer questions.
York, ME
Environment: Suburban
Beth McKenna
What's Your Story?
2nd Grade Math » Working With Numbers!
Big Idea: In this lesson, students will solve and explain more difficult story problems. Additionally, students will explain their thinking in written form.
Jackson, MS
Environment: Urban
Carol Redfield
Something went wrong. See details for more info
Nothing to upload