Theory on student learning provides that students are able to direct their learning when they have metacognitive knowledge about their own learning processes. In this article, a preliminary attempt to assess untrained high-school students’ metacognitive knowledge of learning processes as an ability through multiple-choice questions is reported. In three studies, item selection was established for ninth graders at the end of their school year. Also, in the final study the results showed that the ninth-grade students’ self-reported use of learning and studying strategies, study techniques, school learning and tiresome academic subjects related significantly to their metacognitive knowledge regarding learning processes. In the discussion, the practical consequences for school assessment are explicated and future research questions are raised. (Contains 5 tables.)