In addition to enabling students to gain knowledge, education aims to make them competent, confident, and enthusiastic learners. Using TIMSS 2019 data from eighth graders in mathematics classrooms in Hong Kong (N = 1146) and England (N = 1981), this study explored the relevance of classroom management and instructional clarity to students' mathematics self-concept and value, academic emotions (i.e., enjoyment and boredom) and mathematics achievement by using a latent multi-group SEM analysis. The findings corroborated the controlvalue theory and indicated that classroom management was not always beneficial to the increase of students' enjoyment and achievement in Hong Kong, but the favorable effects of classroom management on academic emotions and achievement were observed in England. Additionally, instructional clarity has been demonstrated to improve students' enjoyment and achievement in mathematics while reducing boredom in both groups, with the advantage being greater in Hong Kong classrooms. The limitations and implications are then discussed. Copyright © 2022 Elsevier.