Books similar to the following can be used with the lessons in the fifth grade kit.

How Tall, How Short, How Far Away? by David A. Adler

Long, Short, High, Low, Thin, Wide by James Fey

Millions to Measure by David M. Schwartz

Sir Circumference and the First Round Table by Cindy Neuschwander

Sir Cumference and the Isle of Immeter by Cindy Neuschwander

Night of the Gargoyles by Eve Bunting

The Lotus Seed by Sherry Garland

An Angel for Solomon Singer by Cynthia Rylant

Ink Sandwiches, Electric Worms, and 37 Other Experiments for Saturday Science by Neil A. Downie

200 Gooey, Slippery, Slimy, Weird and Fun Experiments by Janice VanCleave