In class one of the methods we have used is where the instructor is at the beginning of the weaves. She holds the dog on his or her soft collar and she says are you ready ready. The dog is straight facing the poles (weave wires are used). The owner is at the other end and when the dog is released they weave toward you. A tug toy (if your dog is a tugger is used as the prize, when the weave is completed correctly).
When the dog is entering correctly eventually wires are removed and distance is added plus you will send them with you on the right or left of the weaves. If done incorrectly the word is wrong or whatever and thats a good try but lets try again. You can also add wing gates so the only real way they can get in is to the left of the first pole.
Repetition truly is the best answer.
