2-Digit Addition Computer Lesson Plan

Materials/Resources: projector, screen, Airliner or Smartboard, Base 10 blocks-1 set per student, NLVM website- http://nlvm.usu.edu/en/nav/vlibrary.html

Time Frame: 30 minutes for this individual lesson, but several days overall as they will use the same website on laptops for more practice

Instructional Elements:
Lesson:
We will review our basic addition math facts by playing a game of Around the World using the Math Fact Power Point that I created.

Next I will write several 2-digit addition problems without regrouping on the board, and students will come up to the board and solve them.

Then I will write a 2-digit addition problem on the board and ask how it is different than the previous ones. After taking several answers, I will pass out the base 10 blocks and bring up the NLVM website. I will go to Numbers and Operations, PreK-2, then to Base Blocks Addition. I will lead them through setting up the addition problem with their blocks while I set it up on the website. We will discuss the idea that there can only be 9 cubes or sticks in each column and then share ideas of what to do with the extras. If no one comes up with the idea of regrouping 10 cubes to 1 stick, I will lead them to it. I will have them make the trade as I do it on the website. Then I will ask them if we can leave a group of 10 in the 1s column. We will move the 10-stick to the 10s column and figure out the answer.

We will continue solving as many problems as we have time for. After the first few, I will have students use the Airliner to show the regrouping procedure.

Adaptations:
No physical adaptations are necessary for this lesson.
Low readers will not need accommodations.
Special ed and struggling math students will need me roaming the room and helping out if necessary.
Gifted students can make up their own problems or help the struggling students - their choice. They can also solve 3-digit with regrouping problems.