The students of Mrs. Meriweather's sixth grade class are champions at getting rid of substitute teachers until they come up against the unusual Mr. Marrs.

When Davey Martin's family moves to Mars, he discovers that there's nothing to do--at least until he and his robot dog Polaris learn to seize the spirit of adve

Mr. Creacher, a multi-tentacled substitute teacher, warns his prankish students not to misbehave, recounting rhyming cautionary tales of the weird, spooky, and

Suggests activities to be used at home to accompany the reading of Miss Nelson is missing by Harry Allard in the classroom.

“Bob Zubrin really, nearly alone, changed our thinking on this issue.” —Carl Sagan, The Denver Post If you ever daydream about space travel and human spac