Not NGO but engoo, they're offering teaching chances for English speaking Internet users, if you're fluent in speaking English and writing English simply go and apply with your Desktop computer, prepare for their interview. If you pass you simply start working full-time based on your own schedule of teaching. Engoo wouldn't force you to do more jobs when it isn't on your plan, you simply work on your own schedule. But you should specify the time period which you're chanced for and work base on it. If you're going to be offline also specify it there for engoo so they'll acknowledge your absence and not looking for you when you aren't around. Such can make a tutor lose his or her job at engoo when you make it a routine to be absent from your daily activities via their teaching platform. To be an English teacher or choosing any other subject, you aren't tasked to provide professional teaching curriculum, or lesson note, for them to approve your qualifications. You can teach without such guides, provided you passed their exam which you were interviewed for when you first applied. You can simply simply get started with the online teaching platform by going into their official website via engoo.com.