This is a great INTERACTIVE smartboard lesson!
It is aligned with Math Common Core Standards for grades 2, 3, and 4.
Grade 2: 2.NBT.5, 2.NBT.7 (use manipulatives)
Grade 3: 3.NBT.2
Grade 4: A review to teach before starting grade 4 common core
This lesson explains, step-by-step, how to add and subtract 2-digit by 2-digit numbers and 3-digit by 3-digit numbers. At the end of the lesson there are two fun math riddles for additional practice! I recommend printing those two pages and making copies for your students.
Thank you and enjoy!
Abbie and Melissa