Despite all the benefits claimed for open education resources (OER), studies reveal that these are used less than anticipated. One reason for this is potential users’ uncertainty over whether the products’ aims, design and processes are fit for the intended purposes. This paper proposes a simple-to-use framework for faculty and students to apply in determining whether OER have fitness for purpose in their teaching and learning. The selection criteria are based upon the benefits claimed in the literature for OER, MERLOT’s framework of evaluation criteria for OER selection and Merrill’s first principles of instruction. The criticality, feasibility and applicability of these criteria were reviewed by 207 OER researchers and users through a cross-regional online survey and subsequent consultations with a small team of experts familiar with researching and using OER. The final 25-item final framework was developed in accord with the agreed criteria.