High quality - each section contains clear Learning Objectives and Key TakeawaysMaterial is thorough, appropriately licensed.
Pre-populated quizzes (in the shape of a CSV for importing into LMS) enhance the depth and breadth of materials covered.
These could be used to either be foundation material to a topic as an intro, a starting point to a new topic or a revision exercise.
Material appropriate for the intended audience - it appears to be very high quality.
The content presented online via a huge list of links highlights valid and appropriate concepts for understanding art history. It is core curriculum information that is typically presented in college-level art appreciation survey courses. The content covers prehistory to global art since 1950. The format is presented as a series of links with headers for the specific art period and sublinks beneath the headers.