You can also do part of your training online via elearning .

PADI offers their Open Water class online. Rather than spend time in a classroom, the academic portion of the Open Water course is completed online at your own pace and on your own schedule.
eLearning is designed to be convenient and easy-to-use. You will be able to access eLearning anywhere you have a PC with an Internet connection. Also, you will be able to complete eLearning entirely on your own schedule--there are no class times or places to meet. eLearning will keep track of your progress, and you can begin again where you left-off last time.
eLearning utilizes multimedia and communications resources available on the Internet to enhance the experience of learning how to dive. This includes multimedia content, such as pictures and video clips, links to more-detailed explanations of relevant information and instant feedback on quizzes and tests. eLearning will challenge you to master course material. Through lessons and evaluations, you will deal with the information in eLearning much the same way you would with the traditional dive courses (taught with a workbook). As with traditional classroom dive instruction, passing scores on quizzes and tests will be required to complete the current eLearning program.
Throughout your eLearning experience, you will have contact with Ski and Scuba instructors. Our instructors will have access to your test information, and they will be able to offer feedback and advice where needed.
Following the completion of the academic sections, we will help you select your personal diving equipment and start with the confined water diving sessions. With the new skills that you have acquired, we will then schedule the Open Water dives to complete the certification process.
If interested in enrolling in elearning, please click here.