Tetiana Sel was born in Dnipro, Ukraine in 1992. She completed secondary and high school in International American School in Dnipro, Ukraine. After school, she continued her education at Oles Honchar Dnipro National University in the Filolojical Department with a full governmental scholarship. Her majority was Slavic languages and literature. She completed her first teaching experience at Dnipro Public Secondary School and in EFL courses. Later, she moved to Istanbul where she continued working as an EFL teacher. In 2018, she completed TESOL courses and reached the international qualification of teaching English to children or adults at A1 standard. In 2019 T. She was accepted at the English Language Education Master Program and completed it in 2021. During the master's program, her research interests were SLA, Applied linguistics, and syllabus design. Tetiana Sel, who continued to work especially on second language acquisition for young learners, actively works at Acibadem Schools.