Show and explain the standard addition algorithm

Make up a 3-digit addition problem, for which you must exchange twice (ones for tens and tens for hundreds). 

Use the Base 10 Blocks SMART Notebook, or make your own base 10 blocks and show how to solve your problem using the standard algorithm.  Record (with Jing or similar) yourself solving the problem with base 10 blocks, and simultaneously doing the problem with numbers, and explaining how each step with the materials corresponds to a step with the numbers (just like I did in the modeling and making connections for the standard algorithm video.

Some students from a previous class gave me permission to share their videos with you, so if you want more inspiration, you can look at these: example 1, example 2.

You may find that you can use your mouse well enough to do the problem by using the pencil tool, or you may find that you need to use the text tool.  For your convenience, some of the pages of the base 10 blocks notebook have dragable (infinite cloner) numbers so you can drag the numbers over to show the sum. 

A quickie video on doing this with SMART Notebook

The base 10 blocks SMART Notebook file to download

Read the tips for a good explanation sheet (this tells you the things I am looking for when I grade these!)