Educational paradigms are constantly evolving, considering the large number of active methodologies that are being incorporated to make student learning more meaningful. To this end, the flipped classroom is one of the active methodologies that combines face-to-face teaching with distance learning, and contributes to the formation of autonomous and responsible students in their field.learning process. With the implementation of the National Common Curricular Base (BNCC), it is necessary to seek tools that place the student as an active agent in their learning process. This work aims to evaluate the effectiveness of the inverted classroom methodology for the content of biogeochemical cycles in a class of the 2nd year of high school, in Rio Branco - Acre. It is the result of the course completion work "INVERTED CLASSROOM AS AN ACTIVE METHODOLOGY IN THE TEACHING OF BIOGEOCHEMICAL CYCLES IN RIO BRANCO-ACRE", developed under the guidance of Prof. Alcides Loureiro Santos.