Pearson sought to explore whether the use of Mastering Biology, an online tutorial system used in higher education general introductory courses, is related to students' exam results. This Research Report presents findings from one research study: a correlational study we conducted at a North American state-related, land-grant, doctoral university, where students were using Mastering Biology in the Spring 2017 semester for a foundational biology course. Our aim in using a correlational study design was to seek out possible relationships between the use of Mastering Biology and exam results to identify areas of focus for potential future research using more rigorous causal study designs. The findings appear alongside details of the research study, including a description of the sample studied, method of analysis, results, limitations and generalizability, and notes on possible future research. The report also summarizes the context surrounding the findings, including the research that informed the design and development of the product, the history of the product in the market, how educators use the product, and its intended outcomes. The findings are inseparable from their surrounding context and the design of the study that produced them. To learn more about these elements, follow the links to our Technical Reports in the Research studies section. In the context of the study conducted at the North American university, Pearson found that: -- Averaging at least 90% or better on Mastering Biology homework assignments is associated with a 9% increase in exam scores.