You can use the Library of Congress Classification System to find books on the discipline you are studying. For example, books about "education" have a call number starting with "L". This means you can browse for reference books on the 1st floor, or find general books in the stacks on the 3rd floor, by going to the "L" section of the shelves, identified by signs fixed to the end of each row.
Land Acknowledgment: The University of Washington Bothell & Cascadia College Campus Library occupies Land that has been inhabited by Indigenous Peoples since time immemorial. Specifically, this campus is located on Sammamish Land from which settler colonists forcibly removed Coast Salish Peoples to reservations in the mid-19th century. Today, descendants of the Sammamish are members of several Coast Salish communities.