(topic: Navigation) - A day at the library turns into a cyberventure when Jackie, Matt, and Inez learn that Hacker has kidnapped Dr. Marbles, the only person who can save Motherboard from an evil virus! The team learns to use a map as a mathematical tool as they navigate across a cyber island in search of Marbles...then try to escape before a huge earthquake turns the island inside out! The Big Idea: A map is a mathematical tool you can use to find your way from one place to another, anywhere on earth.