Susilawati, S., Kusumayati, B.A., Sutrio, S. and Doyan, A. 2022. Practicality of Learning Devices Based on Conceptual Change Model to Improve Concept Mastery of Students in the Gas Kinetic Theory Material . AMPLITUDO : Journal of Science and Technology Innovation. 1, 2 (Aug. 2022), 54–57. DOI:https://doi.org/10.56566/amplitudo.v1i2.13.