This article is relevant to entity models that utilize the deprecated Visual Studio integration of Telerik Data Access. The current documentation of the Data Access framework is available here.
The Telerik Code Libraries, http://www.telerik.com/community/code-library/orm.aspx, offers simple projects demonstrating specific problems or features. Here you can also submit a project of yours if you have found an interesting solution of a problem or a demonstration of feature usage.
For larger projects presenting the best practices in end-to-end scenarios, please refer to the Telerik Data Access Samples Kit.