The study presented in this article examines various conceptual aspects for assessing the quality of learning objects (LOs). The main aim is to design an assessment guide enabling the level of quality attained by LOs to be determined by means of a series of indicators. These indicators take into account characteristics relating to design and presentation, and also to pedagogy and technology. The metrics used to measure the level of quality are explained. These entail quantifying the assessment by means of the proposed mathematical expressions and the adopted scale, which is based on values assigned to each indicator. Also presented are the results obtained after applying the proposed guide to a sample of LOs created by the University of Information Sciences (UCI), Havana, to support the educational process.