Here’s a polished version with the schedule incorporated naturally:

I’m looking for a reliable, caring, and organized after-school family assistant to help with my two teens, one in high school and one in middle school. The schedule is Monday through Friday, with every other Wednesday and Friday off.

Responsibilities include picking up from school each afternoon, preparing dinner, packing lunches for the next day, and occasionally taking my daughter to horseback riding lessons.

We also have a sweet Frenchy who will need to be fed and let outside in the afternoon. I’m looking for someone dependable who enjoys teens and pets and can help keep our busy weekday afternoons running smoothly.