Brian P. Cleary 
"Washing Adam’s Jeans" and Other Painless Tricks for Memorizing Social Studies Facts [PDF ebook] 

Need a sure-fire way to memorize everything you need to know for your next social studies test? Brian P. Cleary can help! He’s made up acronyms, poems, riddles, songs, raps, and more to help those slippery social studies facts stick in your skull. And better yet, this book will give you ideas for how you can create your very own painless memory tricks.