Beliefs play a significant role in directing human perceptions and behaviors. Almost two decades of research revealed how students’ beliefs shape their mental action and affective processes in the classroom. In learning environments, students’ beliefs might propagate the idea for achievement and smoothness of learning. In the mathematics learning process, student’s belief about the nature of mathematics and factors related to learning are two components that always concern mathematics educators. Thus, Contextualized Learning Activity Sheets (CLAS) could be highly relevant in this scenario as they provide a structured way to engage students in hands-on activities that not only reinforce mathematical concepts but also challenge and potentially reshape their beliefs about mathematics. Incorporating CLAS into teaching statistics and probability, this can create opportunities for students to actively participate in their learning, fostering a deeper understanding of the subject matter while also addressing any misconceptions or negative beliefs they may hold. Hence, the implementation and use of CLAS could serve as a practical strategy for promoting positive beliefs and enhancing learning outcomes in mathematics education.