The site contains a helpful (approximately 10 minute) tutorial. Exploratory searches on topics relevant to Grade Three Social Studies (Manitoba) provided extensive information and links with ease. I also appreciated the "Teachers' Guide" feature as a selection in the search results. I am impressed with the vast amount of information readily available, but I suspect that one would need to use the site frequently/extensively to fully appreciate the large amounts of information and unique features included. As an American company, there was also noticeable heavy American content (i.e. state by state information, "Today is" feature included primarily American content). Overall, Grolier on-line, even if only utilizing a limited number of features, is definitely worth incorporating into non-fiction studies with students. ( )