Dental students can participate in Invisalign courses for free if there are open spots at the courses. Open spots means there are no paying dentists filling those seats. The cost to a dentist is about $1,500. Obviously if you want to take the class in Beverly Hills or San Diego you're probably not going to get a spot because there are plenty of dentists who want to take the course when it comes to town. However, if you're willing to drive to someplace like Fresno or Riverside you might have a better chance. You can find the information on their website. I used the email on the website and got a brochure of all the dates and locations of the classes. They take 1 weekend.