Integration of external tools to foster learner interaction in MOOCs: The example of Codeboard

1. Alario-Hoyos, C.
2. Estévez-Ayres, I.
3. Kloos, C.D.
4. Crespo-García, R.M.
5. Villena-Román, J.
6. Ruiz-Magaña, J.