Acquiring scientific knowledge about physical activity is necessary for students to become physically literate for life, and cognitive engagement and cognitive levels of tasks are two components that often determine the effectiveness of knowledge acquisition. This study sought to determine the extent to which students’ cognitive engagement in descriptive, relational and reasoning learning tasks contributed to their acquisition of knowledge and the extent to which cognitive engagement on lower-level tasks contributed to higher-level tasks (e.g. descriptive to relational to reasoning). The performance of students in descriptive, relational and reasoning tasks and knowledge acquisition was measured in 992 middle school students in active physical education lessons. The results revealed that students’ performance in relational (regression coefficient = 0.09, p < 0.01) and reasoning (regression coefficient = 0.06, p < 0.01) tasks directly contributed to their acquisition of knowledge (R2 = 0.14). The performance of students in descriptive tasks indirectly contributed to knowledge acquisition through influencing their performance in relational and reasoning tasks (indirect effect = 0.09, p < 0.01).

Based on the value orientation theory, the purpose of this study was to determine the impact of value orientation incongruence between physical education teachers and an externally designed curriculum on student learning in a concept-based fitness-centered physical education curriculum. Physical education teachers (n = 15) with different value orientations taught an externally designed, standards-based fitness/healthful living curriculum to their middle school students (n = 3,827) in 155 sixth, seventh, and eighth grade intact classes. A pre-post assessment design was used to determine whether student fitness/healthful living knowledge gains differed in terms of teachers’ value orientations. An ANOVA on class means of residual-adjusted knowledge gain scores revealed no statistically significant differences based on value orientations. The evidence suggests that teacher value orientation impact may be mediated by curriculum impact. This finding supports the observation that a well-designed physical education curriculum may minimize the impact of teachers’ diverse value orientations on the curriculum implementation and student learning.

Research has shown that interest in knowledge facilitates students' academic achievement in learning. Because individual interest is often based on how much one knows, in other words existing or prior knowledge, studying adolescents' interest in health-enhancing physical activity and its benefits should address the relation between the interest and their existing or prior physical activity knowledge. Understanding this relationship may help us facilitate students to not only develop interest in knowing more about but also actual adopt a healthy, active lifestyle. This study used a large-sample structural equation design to identify the relationship between middle school students' interest in physical activity knowledge and their prior physical activity knowledge, and to assess the change of this relationship over time. Guided by the declarativeprocedural knowledge framework, latent growth models were developed and tested on data collected from a random sample of 3882 students from ten middle schools. The latent growth curve model indicated that, 1) on average, students experienced a significant interest decline in both procedural and declarative knowledge; 2) prior knowledge helped slow the decline and facilitated interest growth in knowledgeable students. The results suggest that existing knowledge determined the interest change.