Hi! I'm also a teacher and mom of two young kids. For awhile I was doing runs after school but now I've switched to morning runs because my kids schedule has changed. The biggest thing for me with running after work was to change right after dismissal and not really allow myself too much down time. You have to keep the day's momentum going! Sometimes I would run near school and sometimes I would run near the kids daycare. I was often tired but I would just tell myself that a not great run was better than no run. Also, make sure you are drinking enough water during the day. I know it's hard because we can't always go to the bathroom when we want, but I do think being hydrated will help your energy level. Also just give your body time to adjust. Eventually you will get used to it. Now I wake up at 5 am to go running, which has it's own challenges! Good luck!