A Component is a defined section on a Page that displays specific content with the purpose to display particular information in a contained block of data that can be moved around and adapted to a page for learning, collaboration or displaying information.
In the example below, various types of components are highlighted on the Unit page 'Romeo and Juliet'.
There are many types of Components build into Schoolbox, sorted in the category tabs; information, collaboration, learning, multimedia, resources and feeds.
Below are some suggestions of how Components can be used on various Page types. And here.