Nikki Clapper

All aboard! Hop on a city train to see where they go, how they work, and why so many peop...

All aboard!  Hop on a freight train to see where they go, what they carry, and why t...

All aboard! Hop on the fastest trains in the world to see where they go, how they work, a...

All aboard! Hop on a passenger train and learn about how they work, where they go, and wh...

While millipedes don't really have 1,000 legs, they do have the most legs out of all the ...

With no ears or eyes, it can be tough to find the head on these fascinating creepy crawle...

Growing up to six inches, the camel spider is a big creepy crawler!  Big, up-close p...

Simple text and full-color photographs introduce crickets.

Even the youngest readers and writers need to learn about plagiarism. Straightforward tex...

What is a primary source? How does it compare to other types of sources? Even the younges...