Kadri, Ayop Shahrul, Department of Physics, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris (Malaysia)
Kania, Nia, Universitas Pendidikan Indonesia & Universitas Majalengka (Indonesia)
Karimah, Ummul, Universitas Negeri Yogyakarta (Indonesia)
Kartianom, Kartianom, Department of Educational Research and Evaluation, Graduate School of Universitas Negeri Yogyakarta (Indonesia)
Kartowagiran, Badrun, Yogyakarta State University (Indonesia)
Kartowagiran, Badrun, Universitas Negeri Yogyakarta (Indonesia)
Kartowagiran, Badrun, Faculty of Engineering, Universitas Negeri Yogyakarta (Indonesia)
Kartowagiran, Badrun, Department of Educational Research and Evaluation, Graduate School of Universitas Negeri Yogyakarta (Indonesia)
Kassymova, Gulzhaina Kuralbaevna, Abai Kazakh National Pedagogical University (Kazakhstan)
Keoviphone, Chanthaboun, Vientiane Provincial Education and Sport Department (Lao People's Democratic Republic)
Kholis, Nur, Universitas Negeri Yogyakarta (Indonesia)
Koh, Poh Wee, Singapore Examinations and Assessment Board (Singapore)
Krisna, Idwin Irma, Centre of Educational Assessment, Jakarta (Indonesia)
Kristanto, Yosep Dwi, Department of Mathematics Education, Universitas Sanata Dharma (Indonesia)
Kriswantoro, Kriswantoro, Universitas Negeri Yogyakarta (Indonesia)
Kumaidi, Kumaidi, Universitas Muhammadiyah Surakarta (Indonesia)
Kumaidi, Kumaidi, Faculty of Psychology, Universitas Muhammadiyah Surakarta (Indonesia)
Kumaidi, Kumaidi, Yogyakarta State University (Indonesia)
Kurniasari, Dedeh, Lembaga Pelatihan dan Katerampilan Cosmos (Indonesia)
Kurniasih, Siwi Karmadi, Universitas Negeri Yogyakarta (Indonesia)
Kurniawan, Dwi Agus, Universitas Jambi (Indonesia)
Kusumah, Yaya S., Universitas Pendidikan Indonesia (Indonesia)
Kusumawati, Mutiara, Graduate School of Universitas Negeri Yogyakarta (Indonesia)

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