Considering that this is not meant as an online course it provides a good collection of links and information about a specific topic during a specific time period. It would be a nice augmentation to an American 19th century history course.
Considering it's purpose I'm rating it at 3 stars. This is medium quality because the site construction is not highly user friendly (navigation tools) and parts of the offering are inaccessible (no alt text or method for visually impaired to learn about the images). It is however very simple and not difficult to use. I'm concerned that some learners would get lost or need assistance with objectives.