Bugs can sneak into the most unexpected places – even into coding! Young coders will don their bug extermination gear in this introduction to debugging! This completely computer-free book explores key concepts such as determining, measuring, checking, and correcting errors in code. Friendly robot illustrations draw in even readers who are reluctant to learn coding. Fun puzzles and games create an interactive reading experience, while clear, accessible...

Describes different types of clouds and how to identify them.

Describes the missions, weapons, and equipment of the U.S. Army Special Operations.

"Amazing photography accompanies engaging information about planets. The combination of high-interest subject matter and light text is intended for students in grades 3 through 7"--

"Militaries need tough fighting machines on land. Tanks and other vehicles roll through deserts and speed through rugged mountains to get the job done!"--

Describes the M1A1 Abrams tank, including its history, equipment, weapons, tactics, and future use with the U.S. Army.

Compares what writers over the centuries have written about an imaginary future with the reality revealed by time.

In 1995, computer programmer Yukihiro Matsumoto introduced Ruby programming language to the world. He created a language that used his favorite elements of other languages, but was more object-oriented and easy to use, even for coding newbies. Ruby is also open-source software, meaning anyone can use, modify, and distribute it. Inside this volume, readers will learn the ins and outs of coding with Ruby, including why using "blocks of text" and mostly...