The Discovery Education Techbook provides a good overview of information about the topics in World History, many good extension activities, many professional development resources, some engaging classroom activities, a solid reference encyclopedia, Spanish translations of assessments, and a good number of written test prompts. This source is designed like a digital textbook. The contents section is straightforward and aligned to the state standards. The reading level is not difficult and the platform is more user friendly than other online resources. I would recommend this resource over some of the other ones that are out there especially the purely online article data bases where teachers have to create their own "text". However this is indicated for 6th grade and World History is taught in 10th grade. There is more breadth than depth in the material. Teachers could rely on this source for a primary guide but need to supplement with more rich content readings. The additional resources are good and there is a great video clip section aligned with each topic.