Applying flow-based principles in teaching computer programming to high school students: A semiotic perspective. - Cesar Goudouris; Antônio Carlos A. Mól; Ana Paula Legey; Paulo Victor Rodrigues de Carvalho; Joana Loureiro Freire; Bianca Maria Rego Martins; Alessandro Jatobá (Educ. Inf. Technol., 2020)