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Follows the life of the popular president, from his childhood on the frontier to his assassination at the end of the Civil War.

Presents basic information about energy in question and answer format.

Looks at triangles and how to identify and measure them.

When Sally's entry in the Best Pie Contest goes missing, young Detective Jeffrey Bones looks for clues.

Danny is not sure what to make of Calvin Waffle, a quirky and smart new fourth grader, but when Danny convinces Calvin to use his brain power to help the baseball team, they both have a chance to become heroes.

Eric's Grandma Minnie and Grandpa Max keep hearing someone knock at their door, night and day, but find no one there, so Cam tries to solve the mystery using her amazing memory.

Danny and Calvin decide to find out why their fourth-grade teacher, Mrs.

A lemonade stand can teach you the laws of supply and demand. But how? As the weather shifts from day to day and a rival stand opens up, demand and supply shift, and so do prices.

Danny and Calvin decide to find out why their fourth-grade teacher, Mrs.

Color illustrations introduce levers, wheels, pulleys, and inclined planes, explain how they work, and show how they are used everyday.

"Mo is the youngest kid on the Robins football team. The kids on the rival team tease him for being a 'butterfingers' who's too tiny to catch the ball.

While Cam's Aunt Molly is competing in a comedy contest, the expensive plate the winner will receive disappears and Cam and Eric set out to find it before the contest is over.

Sara learns about the Jewish tradition of tzedakah when she shares food with a hungry stranger.

A companion to the Theodor Seuss Geisel Award-winning Don't Throw It to Mo ! Mo Jackson is a small boy with a big passion for sports.