Need an afterschool caregiver for my 7 and 11 year old girls

We live near St. John the Divine and are looking for a responsible, proactive, and nurturing caregiver to pick up our girls from school on W 93rd between Amsterdam and Columbus and escort them home; prepare an after-school snack and later, a light meal; supervise homework; engage in games; outdoor time when appropriate. The hours would be from 3pm to approximately 7pm daily (give or take a half hour) but usually amount to 20 hours per week. We are paying $10-$12 per hour. Please contact us at kzb2101@columbia.edu. Thanks!