This Estimation: Sums and Differences Bundle can be used to teach over a span of 1-4 weeks. I use these mini-lessons with my core extension group to provide targeted support for students who struggle with these skills. Students will be able to utilize different modalities of learning. The lessons in this bundle includes youtube estimation music & videos, and you can use smart technology to present this power point lesson.
This bundle has great visuals and includes an estimation vocabulary page, and 2 estimation examples pages for sums and differences. There is also a pre-test, post-test, and weekly quick checks to help guide instruction.
The lesson focus starts with the simple skill set of rounding numbers and estimating sums. Then the lesson focus moves to a more challenging approach (sums to sums & differences). There is even a bulleted lesson plan template that you can use or modify for your benefit.