Walgreens--$35, regularly $60 and promotion
ends 9/30/10. No appointment necessary.
CVS/Minute Clinic--$35, regularly $62 and offer expires 9/19/10. No appointment necessary.
H-E-B RediClinic--$59, doesn't take insurance. No appointment necessary.
Wal-Mart Clinic (Christus Medical Group), only a few locations around Houston, but the Houston one is 3450 FM 1960 West (Houston, TX 77068).--$25. No appointment necessary.
With all of these, you need to bring in the form that needs to be turned into the school.