Teacher Created Resources is offering their 2012 August e-book sampler for free.
Here is what the site says is included in the sampler:
Contents
August 3: Columbus Set Sail from Spain, 1492
TCR9273 Down to Earth Geography, Grade 3
Maps, Globes, and Finding Our Way Around, Pages 9, 13, 20, 154
TCR3664 Magnets and Electricity, Grades 4-6
Making a Compass, Pages 14-16
TCR3047 Mysteries in History: American History Grades 5-8
Who Really Discovered the Americas? Pages 10-13
August 12: Hawaii Annexed to the U.S., 1898
TCR0586 Thematic Unit—My Country Grades 2-3
Nifty Fifty-Math, Pages 48, 80
TCR2027 The Fifties Grades 5-8 Politics and Economies, Pages 16, 96
August 16-First Cartoon (Fiddlesticks) with Color and Sound, 1930
TCR2075-Learning Center Activities: Writing, Grades K-2
Cartoon Sequencing, Pages 57-59
TCR9048-Discovering Genres: Biography & Autobiography, Grades 3-4
Picture This, Pages 32, 170
TCR2996-Persuasive Writing, Grades 6-8
Editorial Cartoons, Pages 86-88