Like 1st grade, 2nd grade will spend a majority of 2nd quarter working on addition and subtraction. In 1st grade the focus is on developing the concept of addition and subtraction, as well as fact fluency within 20. In 2nd grade, students will be modeling addition and subtraction, and adding up to 4 digit numbers with regrouping!
During Q2, we are going to really focus on 2 digit numbers, both modeling and the traditional algorithm. We will return to addition and subtraction during Q3 to build up the number of digits in the numbers students are working with.
This is a really excellent article to build your own knowledge of column addition and subtraction.
The first step in planning for such a meaty unit is to create a vision of success. What will your students be able to do at the end of the unit. We have the IA, but we want to make sure we are breaking down the skills that students need. We also do not want to wait until the end of the quarter to assess.
Here is a sample unit test for addition and subtraction.
Breaking down addition and subtraction into daily objectives can be a bit challenging.
Here is an example of how I broke them down and the sequence that I would teach them.
Students are going to start by wanting to directly model because that strategy was effective with smaller numbers. The goal is to extend this understanding to directly modeling with place value blocks, rather than drawing 84 circles. Using graphic organizers will help them effectively use the blocks to add and subtract.
Once they understand how to add and subtract place value blocks, they are ready to use the algorithm as way to record what they are doing with the blocks.
Once you have your unit level planning done, here are some resources to help with daily planning:
It is important to teach addition and subtraction together so students understand the relationship between them. Adding to check your subtraction is a great strategy to ensure you got the correct answer and to practice addition while working on subtraction.
Here is a center that focuses on checking subtraction with addition.
This unit is going to be very heavy on word problems because students rarely use subtraction and addition with context. Resources for teaching problem solving are coming soon.
Here are some great centers and activities, check out Stage E
Mrs. Lemons Blog has some amazing resources for teaching all things 2nd grade, here are some addition and subtraction
freebies
Here is a great video modeling how to encourage students to use multiple strategies. With the new TEKS students need to be able to model with pictures and place value blocks, not just the traditional algorithm.
Brain Pop Jr is always a great way to reinforce these concepts during transitions or down time. Email Amanda if you need the KAPS login :)
I will continue to hunt for high quality resources and share what I find!
