When she notices some bones missing from a dinosaur skeleton exhibited in the museum, a young girl with a photographic memory tries to discover who has been taking them and why.

Introduces Roman numerals, explaining how the letters of the system equate to modern numbers, how to count, add, and subtract in the system, and demonstrating the many instances of Roman numbers found in modern culture.

While helping his family make ends meet during the Great Depresion by selling newspapers, a boy meets Babe Ruth.

Mo is new to ice hockey and is having trouble staying upright on the ice, but his desire to help the team motivates him to keep getting better.

Cam Jansen and her best friend are spending three weeks at Camp Eagle Lake, where they play sports, do crafts, and solve three mysteries.