About the author: 

Rafael Rodrigues, 42, was born and raised in Juiz de Fora. He studied electrical engineering at UFJF and earned a teaching degree in mathematics at Unopar. He worked as a math teacher for 13 years at various schools in Juiz de Fora and five other cities. He also served as a coordinator and school principal. In 2008, he founded his own school, which reached more than 1,500 students in less than two years. In 2011, after selling the school to a large educational chain, he founded Casa da Gráfica, where he currently serves as CEO. Today, the company employs more than 150 people and provides schools, publishers, and educational systems throughout Brazil with a variety of solutions for physical educational materials.