i have had several different teaching jobs in a wide variety of settings and neighborhoods. the best part of all of them is the kids, i do love teaching and i miss the kids so much now that i am home. there are a lot of negatives though. it is exhausting. you mostly work about 7 to 5, then come home and do homework. the part that i found the hardest is that even when you are "done" for the day/weekend,,, if you are a conscientous teacher, you are just never really done, there are always things you can (and should?) be doing, improving, changing, etc. i didnt like that feeling always hovering over me, the guilt and the un-finished feeling all the time. but i did like the creativity and coming up with better ways to teach something. i also found it hard working with mostly women, they can be so nasty and there are so few men to balance/mellow things out. the politics can be awful too. it really depends on the district and how supportive they are of their teachers. i worked for one principle who used to make teachers cry, she was so nasty, but she allllways had our back in front of a parent, even if she disagreed with us in private. and she never caved in to pressure from the district or the parents, which made for a very safe secure school with good structure and high standards. not very warm and fuzzy, but you knew where you stood and the teachers were committed to the children. a couple of things i would do would be to hang out at the school around dismissal time. if all the teachers run out at 3, i would question the level of committment in the school and the level of satisfaction and good feelings of the staff. i have worked in schools with contract problems, etc, and its awful when everyone is angry and feels taken advantage of. the kids lose out and you lose the best part of teaching, which of course is feeling like you give your best and make a difference. go to a pta meeting too, you will get an idea of involvement of both the parents and the teachers. and not the first meeting or 3, thats not a good indicator.
overall, if you really love kids, its a wonderful job. its tiring, but i find being a sahm much more exhausting. summers off is definitely wonderful, and being on the same schedule as your kids. though when i was teaching, i always had to supplement my income by teaching in the summer, but thats not bad at all, i mostly tutored, which is nice and flexible. try to see what the climate is in your area, talk to teachers and parents, go to pta meetings, go to board/budget meetings. subbing is a good way to get an idea of how you like being in the classroom, but its not like regular teaching. its a good job in itself in some ways. i was a regular sub when i was pregnant, it was perfect for me. i gave up real job satisfaction and building relationships with the kids (and money) in return for truly walking out the door free and clear at 3 30, which was perfect for me at the time. and its a great way to get your foot in the door. good luck.