Most of your assignments at the UW will require that you include at least some scholarly, peer reviewed articles. Peer review means the articles were read. commented on and corrected by experts before they were published.
The History of Science relates to other areas of study; in addition to searching for articles in databases specifically related to the sciences like Web of Science, you may wish to try general-interest, interdisciplinary databases as well, like Academic Search Complete, JSTOR and the ProQuest Platform.
For more on understanding and using peer-reviewed articles, see the Library's YouTube Channel for a three-part series, Understanding the Scholarly Article:
If you need additional assistance, feel free to email the Librarian for History Michael Dudley at email@example.com.