I consider 16 teaching hours (40') + 12 office hours as 22 working hours.

I mostly ignore jobs with office hours attached, because I always teach part time, beside my regular work, so 'office hours' in one job could be 'teaching in another School' or 'sleeping in my bed' hours,too.

Chinese Schools rarely consider office hours as working hours. I find that very 'ben', when School requires office hours, butt.....pays only 'teaching hours'.

Ideal full-time teaching job is low working hours (10-16), and then more hours at another School or Kindergarten.  

It's not a whole lot I'm telling you now. And half the time you probably won't be working. Well, that is of course what job you have. If you are working at a bar or as a foreign waiter/ waitress I could see them working long hours and very hard. 

If you are teaching it's very minimum compared to how many hours teachers in countries like the U.S. would be working. But the difference is pay also. The teachers in the states are probably making double of what teachers in China are making. 

Average teaching hours will depend on which industry yoiu are in - kindergarten, the schools (usually middle or high school), private mill, or (public) tertiary.

The unis usually require less teaching hours, but put on more office hours so you don't go get another job with another school. As Incif said, most places think that if you're not teaching, you don't deserve money... I think that's complete BS!!! If youi require me in your work-area... you pay me for ALL of it!

Language schools will try and get more hours out of you - but unlikely to get up to 40, let alone 60.

So, to answer your question. it'll be relatively easy to get more hours - just don't expect to get paid for them!

Also, note that there is a tendency to pay LESS for overtime than for regular hours!

Your best option is going to be to get a second job... that way, you get more hours, and get paid. However, most employers won't be happy with you... (at least, not the main employer)

Btw, in Australia and the US, unless you're talking schools, teachers don't work so hard... usually about 20 teaching hours per week at university.

16 teaching hours plus 2.5 office  hours (half hour before lunch daily). Anything over that be it teaching or office hours they pay me time and a half.

Correcting and proofreading for any faculty member, I also get paid per page  unless it is a thesis or scholastic paper. Then I get paid a flat fee per 10 pages, even if they decide not to use my corrections.

First teaching job I had my breaks were longer than my teaching hours. Since I lived down the street I'd spend most my time just sitting at home.  I had a 3 hour, yes 3 hour lunch break.  And to top if all off my classes were only 30 minutes long so they went by so fast!

If I ever go back to teaching I'm thinking about calling that school again to see if I can get a job there. The hours are just too damn good to pass up. Doesn't even feel like you're working

To answer the question about getting extra hours money.... I suggest tutoring on your own.  I know a few foreigners who put up ads around their neighborhood or school offering English tutoring. 

You can charge more money than an agency will pay you and you can set your own schedule. 

From my experience, and I've accumulated a lot now, it's kind of a trend (monkey see, monkey do) that more and more language schools are expecting office hours. When I first started (TEFL) over ten years ago, it was just straight teaching work with relatively stable classes, averaging 20-22 teaching hours and NO office hours, yet under the duties of a foreign teacher, i.e. class planning/preparation time on one's own, was still considered full time under a qualified school's sponsorship! Pay and standard benefits (accommodations, furnishings, weekends/days off) were all about the same. I marveled that I was working very similar to my college teachers. Then, somewhere along the line, schools started asking for more time in the "office" and the trend became more-or-less a 40/week job - of which, I could have or should have just stayed back in the U.S. with my previous assets including workers' rights, for that type of typical work situation. Yet, as I recall my college professors back in the States, they primarily prepared either at home or even with their laptops at the beach - they came in prepared, taught classes, minimally attended necessary meetings, held "office hours" - to make themselves available to consult with students only a couple of hours a week (usually by scheduled appointment and sometimes walk-ins if during those available hours without any other appointments) - I envied their work scheduled (of classes approx. 9-11 a.m. then 2-4 p.m. or some variations to that effect; and I purposely chose to have that kind of life-style (work schedule) when I planned on teaching in China and sharing my culture and language, as this job entails. Now it's all changed whereas many schools who in fact request office hours also pay more for being there 8 hours a day like a regular boring job. On the other hand, some schools, when recruiting will deceitfully post ads of offering 20-25 teaching hours per week (my standard), but hide the fact that they also want the foreign teacher to hang around the school/ office all day (either to help do interviews, some paperwork, English Corners, outside activities like handing out flyers, often attending useless meetings, or mainly just to be on-call FOR SHOW (like a prop), as simply to be seen by prospective clients when they pop in, e.g. "Look, we have a foreign teacher here" virtually 24/7 if they could get away with it! Major chain schools will clearly post the combined hours and highlight highly competitive pay as compensation, while less credible schools will try to squeeze the extra hours (including overlooking OT work) out of their foreign teachers without much compensation - primarily training centers are guilty of this. We find that while many public schools have a set salary range along with basic work hours, they will still from time to time ask for a little more face time through occasional activities to help give students more exposure to foreigners and opportunities for more relaxed language communication practice - nice schools I have dealt with offer free dinners, social outings, holiday parties, talent shows, attending sports meets, etc. Usually these can be very cordial. But the only real down side to this would be many times the inconvenience of sudden notice (little to no fore-warning) to these extra events; and with good working relationship (cooperative spirit), these requests are hard to say no to!