It reminds me much of the manner in which I first learned Chemistry myself in high school. This is to say that there are no themes or projects here, and certainly no lesson plans or any pedagogical basis. It also boasts a tremendous store of classic papers from the history of chemistry, and a requisite area for bad chemist humor. It is text based, which I don't mind because it means the site is faster. This site is teacher run and maintained.
Some people dislike the text only format.
The Science Railroad link is disappointing, but that isn't ChemTeam's site. While not specifically Chemistry, this high school science department site is a model for what high schools should put on the web. It explains the course of study that students take at South Pasadena, including descriptions of the courses. For Chemistry Students, they provide Study Cards on-line in pdf format. This starts to show what can be done to link schools on the internet.