The authors Marc Jansen and Till Adams wrote the book “OpenLayers – web development using dynamic maps and geodata” (sorry, in german only), which is being published in April by Open Source Press. Who would be more suited to introduce interested people to the subject of OpenLayers than the two authors. The company terrestris is very happy that the Open Source School has included this training course in its’ agenda. There is more information on contents, requirements, costs, etc. (sorry, also in german only) here.