I fancy working as a freelance teacher. Is it possible?
Working as a freelance teacher is a very common way of making extra money, but most teachers will do it as 'income on the side' rather than something to be relied upon for a full-time salary. Being successful as a freelance teacher often depends upon the ability to 'market yourself' but once you get your first few students, many teachers find that word spreads fast and before long - you're actually turning work down.
Take a look at this Ajarn article on freelance teaching for some tips and ideas and for some of the perils and pitfalls of this type of work.