Once your dog is consistently taking the disc out of your hand, kneel down and position your canine in front of you about three feet away. Instead of handing him the disc, say, “Catch” and gently toss the disc in the air just in front of your dog. Never throw directly at your canine. Always let the canine move to the disc. If your dog moves towards the disc and attempts to catch it, give him lots of praise. Since you want the catch to be the reward, don't let him pick the disc up off the ground if it's not caught. Repeat this exercise until he catches the disc consistently. Also, make sure that you are releasing the disc at a catchable angle, so the disc's edge is easy for him to grab.
Next, position your dog to your left side (if you are right handed) and make a short throw (less than five yards) into the wind. As your dog's catching consistency improves, simply extend the distance that you throw the disc farther and farther. It is a good idea to make these throws into the wind so the disc will fly slowly and float long enough for your dog to make a catch.