Teachers often work nights and weekends. They'll be doing anything from helping with extracurriculars, to looking after kids on excursions, to marking and writi

Teachers often work nights and weekends. They'll be doing anything from helping with extracurriculars, to looking after kids on excursions, to marking and writing reports, to for-profit tutoring, to planning lessons. A science teacher will stay up to date with what's happening in their speciality, and might have semi-related hobbies like birdwatching, or archaeology. It's a little harder to pin down than side projects, but the activity is still there.