Which "To, Too, Two" to use? That is the question?!? This seems like a struggle with a lot of kiddos. My son was getting pretty frustrated with it, so I created him this cute anchor chart that can easily be put into his notes binders. Anytime we are working on this subject he just pulls this out and uses it as a reference to help him decide which "to" to use.
As always, I have made this available to you for free, you can print it out here.