List of Speaker Participant

No	NAME	INSTITUTION	CATEGORY	Title of Paper	PAPER
81	Nabilah Putri Mabrukah	Yogyakarta State University	Chemistry Education	Student Career Interests in Science: A Study of STEM-Based Learning on Buffer Topic	OK
82	Sabrina Aulia Afifah	Universitas Negeri Yogyakarta	Chemistry Education	Chemistry Teachers’ Perception About Socio-Scientific Issues Context Based Learning	OK
83	Lisya Asmiati	Yogyakarta state university	Chemistry Education	Analysis of Ideal Learning Hours of Chemistry on Materials Chemical Balance versus Student Learning Results: Literature Review	OK
84	Abdillah Nur Fitriana	Universitas Negeri Yogyakarta	Chemistry Education	Development Of Chemical Equilibrium E-Book in the Environmental Context To Promote Students’ Chemical Representation Ability	OK
85	Endang Jariati	Universitas Negeri Yogyakarta	Chemistry Education	Multiple representation-based e-book for chemical equilibrium topic: A development process	OK
86	Rika Wulandari	Universitas Negeri Yogyakarta	Chemistry Education	The Chemistry Bonding Module with Problem-Based Learning Approach Contributes to Improving Critical Thinking and Students’ Self-Directed Learning	OK
87	Syaza Syahana	Universitas Negeri Yogyakarta	Chemistry Education	Effectiveness Of “Kampus Mengajar” Programs In Increasing Literacy And Numeration
88	Retno Subekti	Universitas Negeri Yogyakarta	Mathematics	The mean-variance method for optimizing gold portfolios and Sharia-compliant stocks
89	Nikenasih Binatari	UNY	Mathematics	Stability criteria of two-dimensional delay differential system using Pontryagin Theorem
90	Benny Yong	Parahyangan Catholic University	Mathematics	Using The SI1S1I2S-Type Epidemiological Model to Determine Important Parameters for COVID-19 Transmission with Reinfection in Indonesia

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