Desde que se estude a matéria ...

... tudo bem: «The Internet revolution brought a lot of changes in the educational system. Instead of relying on textbooks, notebooks and other conventional classroom materials, students today rely on their tablets and smartphones, which carry a lot of potential for making the material more interactive and understandable. There are both free and paid online educational resources out there, though, with plenty to choose from. [...]» (Dashburst, 26 de Dezembro de 2013)