Reflection: Staircase of Complexity Stop, Look and Check (Part 2) - Section 1: Review

 

The Common Core standards do not include the teaching of the subtraction algorithm in second grade, but they do suggest that students solve double-digit addition and subtraction problems within 100 using place value strategies. My purpose here is to provide one way to access those strategies. I still provide students with base 10 blocks, tens frames and encourage drawings, but I know that some students are ready for a more abstract representation for solving problems (MP2).

For this reason, I provide students with specific strategies that a competent math student uses automatically to solve problems. Stop, Look and Check is one of these strategies. Adults do it automatically. They look to see if they need to borrow, but it is a subconscious process. I am bringing the process to the forefront for students to understand what they are actually doing when they solve a problem. 

We can teach the steps that a competent math student uses automatically, as well as watching for students to figure out a method on their own. In both of these we are encouraging students to think about their own work and to reason mathematically (MP2) which is fundamental to the Common Core.

  Beyond Common Core
  Staircase of Complexity: Beyond Common Core
Loading resource...
 

Stop, Look and Check (Part 2)

Unit 18: Strategies That Work
Lesson 9 of 16

Objective: SWBAT determine if they should borrow when solving number story problems.

Big Idea: Learning the process of subtraction is not enough, you need to be able to know when to use it.

  Print Lesson
1 teacher likes this lesson
Subject(s):
Math, Number Sense and Operations, Operations , subtraction, reasoning, review, estimation
  65 minutes
100 1381
 
1
2
3
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!
  Favorites(8)
  Resources(14)
New Orleans, LA
Environment: Urban
Amanda Cole
 
The Recipe for a Great Word Problem
2nd Grade Math » Addition and Subtraction Basic Training
Big Idea: The big idea of this lesson is to have students write their own word problems to help them have a better understanding of mathematical operations, as they relate to real world scenarios.
  Favorites(66)
  Resources(14)
Pepperell, MA
Environment: Rural
Kristen O'Connor
 
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.
  Favorites(31)
  Resources(21)
Jackson, MS
Environment: Urban
Carol Redfield
 
Something went wrong. See details for more info
Nothing to upload
details
close