de Aguiar Costa J. FEDATHI SEQUENCE IN THE TEACHING OF SPECTROSCOPY AND ASTRONOMY: A QUALITATIVE ANALYSIS OF MEANINGFUL LEARNING IN THE 9TH GRADE OF ELEMENTARY SCHOOL. GEI [Internet]. 2026 Jun. 24 [cited 2026 Jul. 1];6(04):400-15. Available from: https://www.periodicojs.com.br/gei/article/view/3073