There are actually a few different ways to teach the weaves, what one is best really depends on you and the dog.

One way is to channel the weaves, that means to have them so the dog can run straight down the middle at first and at the end they get a treat. Then slowly move the weaves in a bit each time until the dog has the motion it needs and the poles are together.

Another way is to gate the weaves. What you do is put gates on each side of the poles. So you would go first pole with part of the gate touching it, skip a pole in the middle and then the next pole. In other words odd poles get gated on one side evens on the other, then the dog goes through the poles and learn the motion that way, it's sort of a no fail method, which is good for dogs who get discouraged easily. Once the dog gets confident enough with the gates facing the poles you can turn the gates around so that they are still on the poles but there is a little bit of escape room, but that's for when the dog is more confident.

There are a couple of other methods, one with wires which is pretty much like the gate system only using wires attached to the poles instead of the gates. And the other is hard to explain.

Other then that just keep the training fun and positive, and short you don't want to over do it after all. Oh and remember that the proper entrance for the weaves is for the dog to enter on the left side.