Home Connect for Reading Renaissance (AR) https://hosted104.renlearn.com/209121/homeconnect/login.aspx
National Geographic for Kids http://www.nationalgeographic.com/kids/
Ben's Guides to US Government Den's Guide for kids to U.S. Government Can pick your grade level - has a section on electoral process that you can read and discuss with students, plus other sections that deal with gov't. http://bensguide.gpo.gov/
Brainpop - Has cute short animated videos that tell about presidential elections, voting, democracy, primaries and caucuses etc. Very informative. http://www.brainpop.com/search/index.weml?keyword=election
Cyberbee's activities for elementary students including a list of reading links, scavenger hunt, audio clips, coloring pages, and craft. http://www.cyberbee.com/election/elem.html
PBS Kids http://www.nick.com/kpp/
Reading text book link for online activites for each story. Just remember to change the story title each week - white box with a drag down menu. http://activities.macmillanmh.com/reading/treasures/stories/story_lessonlist/2102045.html