It depends on my life situation. I have had times when I purely taught online (for instance when I was in India). If you live in a country like Mexico, where you earn $3/hr, it might make more sense to teach online, where you can ask for $20 per hour and work 5hrs per week rather than 35hrs. Teaching 35hrs per week is quite exhausting too. It is not so difficult to get 5hrs sorted weekly - only requires between 3-5 students. So it depends on you, but there a few nice platforms out there. I also use free advertising platforms in various countries (e.g.: talkin.eu in Slovakia, or OrangutanEnglish.com in Japan) that are specifically focused on language classes.