Seeking sitter for our 11 year old, who is out of school

We are searching for a sitter for our 11 year old daughter. Her last day of school is May 22nd and my (mother) last day of teaching isn't until June 4th. The person will pick up the days that our regular sitter can't do or she isn't at a friend's house. Those exact dates will be disclosed if hired to sit. She will just be finishing up her 6th grade year. She is an all A student, competitive swimmer, loves drawing, crocheting, and gaming. We are looking for someone who has a strong educational background (college student or recent graduate) and does not have children of their own.