Afterschool sitter for two children (2-3 days a week)

Penn professor looking for babysitting help with two children, 9 and 11. Need help 2-3 days of the week, between 5:30pm to 8:30pm typically. The babysitter is expected to pick up the kids from school in Center City and bring them home to Northern Liberties, and go through the evening routine - assisting with homework, giving dinners and preparing for the bedtime routine. A car is not necessary, but if you have one, willing to pay a higher rate and parking will be provided.
Looking for someone educated, patient, very responsible, organized and loving! If read this far, please respond with the word children.