Answer:
Research online for an art teacher near you or contact your local art school or art programs.
There are commercial for profit tutoring schools today and they hire credentialed teachers to tutor in many subjects. Look in the phone book in your area for these schools. Ask the local high school art teacher if they would tutor. All teachers can use extra money. ( I should know I am a retired teacher).
Check with your local Art council. You could also check with the education department of your local art gallery and see it they have any art educators that do private lessons either within the gallery or elsewhere. Another place to look is at fine art stores many of them hire artists to teach classes. A local college with an art education department is another great way to go they may have weekend programs or students that could give private instruction.
You can also look on the internet. I am an art teacher that gives private instruction for children I keep a blog with some of the things I make and lesson plans.
In the Rochester NY area:
this is the info for the Rochester Arts and Cultural councils listing of artists:
http://www.artsrochester.org/cgi-bin/artistsdir/New/artsrochester2.htm
the Memorial Art Gallery's Creative Workshop
http://mag.rochester.educreativeworkshop
artteacherforhire.blogspot.com- my blog