Will doing two lessons a day add to one's "streak"?
You just have to reach your daily goal to keep your streak. :)
It depends on how much XP you are required to do every day. To change the amount of XP go to settings and click Coach.
It also depends on what kind of lessons you are doing, for example regular lessons or strengthening skills with timed practice. Generally finishing one lesson will give you 10 XP
With timed practice, you could get as low as 0 or as high as 20.
i don not no streak is who