I forgot to mention a couple of important things I'm expecting to happen. First of all, I thought about measuring bytes *only after* the qualitative part is assessed (kinda like publishing guidelines, which I'm trying to make them acquainted with). But I think the reason this could work is because at least half of the enrolled students have already worked with me in other previous classes with Wikipedia editing. My idea is to make them help the other students learn how to edit during the course, together with the ambassador.
In the last course I offered, some students later got Good Article status, and they were very excited and proud (
https://pt.wikipedia.org/wiki/Genotdel,
https://pt.wikipedia.org/wiki/Filipa_de_Lencastre). This wasn't the main goal, but kept them engaged even months after the course. A Facebook group helped with continuous lively discussions - the students are always there, anyway. I'm also relying on word of mouth, which has actually been proven quite effective. ;)
Juliana.