1. Why Vote? This highly effective tool from TPS Consortium member, The Right Question Institute, is just what you need to get students thinking about issues that matter to them and how they are impacted by voting. There's a video intro, a lesson plan, and a version in Spanish. Below is a screenshot of the first page:
There's another section for working with adults, too.
2. The grammy award winning musician, Ani di Franco, has written a children's book titled Show Up and Vote! The publisher, Penguin Young Readers, has partnered with Bookshop.org and a voter registration organization called HeadCount to donate books to underserved communities. (FYI, I sometimes order books from Bookshop.org because they contribute a portion of sales to support independent booksellers, and you can even choose your favorite independent bookstore to receive that donation. It's almost as fast as Amazon!) In addition to informing children about voting, this might make a meaningful civic engagement service project for school clubs or classes.
The Library of Congress has hundreds of primary sources related to voting and voter registration. Both of the above resources could easily be paired with such items as the political cartoon below by Thomas Nast (only a beginning):
Pre K - 2 3 - 5 6 - 8 9 - 12 Social Studies/History Library English/Language Arts Right Question Institute voting rights elections voter registration