Exhibits are not accidental. Considerable resources and expertise are required to mount an exhibit. Exhibits must necessarily have some perspective, otherwise the selection of items to present and the way in which they are presented would have no organized basis. Spend at least two hours reading up on the topic beforehand. Mention how you prepared for it.
Newspapers carry reviews of major exhibits when they open.
Be prepared to discuss in class. The Berkeleyan lists campus exhibits. There are descriptive guides to museums and historic sites in California as well as tourist guide books. VIAonline has a searchable online database of event and exhibits. Museums in California.