“…Studies have also found that students who take advanced courses in high school, such as AP courses, tend to outperform students who do not (Keng & Dodd, 2008). Geiser and Santelices (2004), Klopfenstein and Thomas (2005), Sadler and Tai (2007b), Warne (2017), and Warne, Nagaishi, Slade, Hermesmeyer, and Peck (2014) found that the strength of the relationship between advanced course participation and college achievement depends on the additional covariates in the model. An unresolved question is the correct methodological approach to estimating how GPAs should be weighted by course type.…”