Lestari, Titin, Nurhanurawati, Caswita, and Dwi Yulianti. 2023. “Thematic Teaching Materials Using Science, Technology, Engineering and Mathematics Approaches to Improve Problems Solving Ability of Elementary School Students”. Jurnal Penelitian Dan Pengembangan Pendidikan 7 (1):126-34. https://doi.org/10.23887/jppp.v7i1.60361.