Peterson's offers some of the most widely used education resources available online. In addition to publishing hundreds of academic titles, Peterson's also offers customized learning content to corporate, government and non-profit entities.

Concentric Sky provides development and managed hosting services to Peterson's – building and maintaining their online practice tests, including the systems designed for Computerized Adaptive Testing.

“Concentric Sky has consistently provided quality results throughout our partnership. Concentric Sky is always available to assist us with the maintenance and growth of our platform; from brainstorming sessions to the delivery of code. We knew we made the right decision to begin using Concentric Sky's services when they made the transition process seamless and helped us create efficient new processes right out of the gate. ” - James Holsinger (Peterson's)