What are you doing for 10 hours on a Sunday? I work Sundays but between 2 and 3 hours only. That's lesson planning and setting my weekly homeworks. I get marking done in my frees, occasionally at home. I reckon I work from half 7-4 on week days and the 3 hours or so at a weekend. Roughly 45 hours a week. Most of the things I work on are to tick boxes for management. All the data tracking and most marking is done so management will be satisfied. Very little time actually goes into planning lessons as the marking and data tasks take up too much time amongst behaviour stuff like ringing and emailing home.