Aims to examine the effect of the use of two Open Educational Resources (OER) (a Khan Academy online tutorial and an open textbook hosted on Wikibooks) with respect to the increase of logical-mathematical outcomes of first- and second-year higher education Chilean students. It also aims to uncover teacher and student perceptions about the use of OER in order to understand how these resources are used and valued. For these purposes, quantitative and qualitative methods were used to analyse student performance data and data produced from semi-structured interviews, focus groups and a survey. The research process was comprised of a student survey, student focus group, generation of an impact analysis database, and teacher interviews. The published dataset does not include the student survey instrument and microdata, as access to this is restricted due to ethical constraints.