One if by land! Too many tombstones! Four funny friends! Spooky old places! Lots of clues and it's a race to the finish! When their schoolteacher cousin disappe

The corresponding Teacher's Guide is a page-by-page supplementary resource that gives you additional activities to enhance the student's learning opportunities

Serena Marlowe and Carly Heiser attend a two week field hockey camp at Boston University and have an exciting time, tracking down historic sites and stolen arti

If a kid can understand the county they live in... then they can understand the world! After all, this unit is a mini-microcosm of geography, government, histor

Take your mark and race after four kids as they try to track down the mysterious whereabouts of their school-teacher cousin who has disappeared from the famous