Centra (Virtual Classrooms) is a real-time virtual classroom environment provided by Contact North. OSHKI students acccess and use Centra using an Internet connected computer and a headset to attend and participate in live, scheduled classroom and tutor sessions. A Centra session allows instructors and students to meet as a group or to meet one-on-one on the Web and, from there, to listen to a lecture, to text chat, to participate in two-way discussions, to view presentation slides, to share an application, and to visit other web sites on the Internet.

Adequate and reliable access to the Internet is necessary for this method of delivery.