Adler, David A

Explains the basic laws of supply and demand using examples kids will understand, such as dueling lemonade stands on the same block.

This introduction to the mathematical estimating and rounding explains the difference between the two, their uses, and gives directions for estimating and rounding.

Introduces the physical properties of objects that sink or float and offers examples of them in everyday life, along with simple experiments to try at home.

When Grandpa's lucky hat goes missing during a college football game, detective Jeffrey Bones and his friend Sally help look for it.

Detective Jeffrey Bones helps a clown who performed at his friend's birthday party to find some lost clothing.

A simple biography of the noted African-American track star who competed in the 1936 Berlin Olympics.