The subjects used to describe resources on OER Commons are designed to cover Pre-K-12 and Higher-Education settings within the US and internationally. Our subjects are organizing into first-order subjects and secondary topics within those subjects. When describing or searching for content on OER Commons keep in mind that content can be categorized by multiple subjects and topics.
| Applied Science | Architecture and Design |
| Computer Science | |
| Environmental Science | |
| Engineering | |
Arts and Humanities | Health, Medicine and Nursing |
| Information Science | |
| Art History | |
| Graphic Arts | |
| Languages | |
| Literature | |
| Religious Studies | |
| Performing Arts | |
| Philosophy | |
| Visual Arts | |
| World Cultures | |
Business and Communication | Accounting |
| Communication | |
| Finance | |
| Journalism | |
| Management | |
| Marketing | |
| Public Relations | |
| Career and Technical Education | Agriculture |
| Automotive Technology and Repair | |
| Criminal Justice | |
| Culinary Arts | |
| Electronic Technology | |
| Environmental Studies | |
| Film and Music Production | |
| Graphic Design | |
| Manufacturing | |
| Maritime Science | |
| Welding | |
Education | Early Childhood Development |
| Educational Technology | |
| Elementary Education | |
| Higher Education | |
| Language Education (ESL) | |
| Special Education | |
English Language Arts | Composition and Rhetoric |
| Language, Grammar and Vocabulary | |
| Reading Foundation Skills | |
| Reading Informational Text | |
| Reading Literature | |
| Speaking and Listening | |
History | Ancient History |
| U.S. History | |
| World History | |
| Law | N/A |
Life Science | Anatomy/Physiology |
| Biology | |
| Botany | |
| Ecology | |
| Forestry and Agriculture | |
| Genetics | |
| Nutrition | |
| Zoology | |
Mathematics | Algebra |
| Calculus | |
| Functions | |
| Geometry | |
| Numbers and Operations | |
| Measurement and Data | |
| Ratios and Proportions | |
| Statistics and Probability | |
| Trigonometry | |
Physical Science | Atmospheric Science |
| Astronomy | |
| Chemistry | |
| Oceanography | |
| Geology | |
| Hydrology | |
| Physical Geography | |
| Physics | |
Social Science | Anthropology |
| Archaeology | |
| Cultural Geography | |
| Economics | |
| Ethnic Studies | |
| Linguistics | |
| Political Science | |
| Psychology | |
| Social Work | |
| Sociology | |
| Women's Studies |