What makes your resume/teaching portfolio stand out if you're trying to be an elementary teacher?

I know that you need a degree first, but what would make your resume/teaching portfolio stand out amongst others to potential employers? Does having a lot of experience teaching help (like volunteer teaching, etc)? Does having a book of lesson plans, and examples of student work from kids you have taught as a volunteer help? What should I have to make me stand out?

For me, I want to teach elementary education, I plan to get my masters in it soon. I have heard that it is difficult to find a job, although I don’t know for sure if this is true. I want to stand out though, and I was wondering what i should have to do so?