For getting an entry into physical therapy profession you need a minimum of baccalaureate degree from an accredited physical therapy program. As soon as you finish this course you can easily get a job in hospitals or rehabilitation centers. But since you are working as a teacher now, you can also go for an online program in physical therapy. This would allow you to continue with your teaching profession. There are many accredited colleges offering physical therapy courses. The site http://physicaltherapycolleges.org/  would be helpful for you, as it has the complete information about physical therapy career. Once you finish your bachelor's degree, you can go for a master degree or doctoral degree programs in physical therapy in order to continue your studies.