Repeat in opposite direction to get dog used to jumping on both sides of handler. Then switch dogs. This is repeated several times for each dog and then they change places until all dogs have had a turn jumping. You need to use a very small dog such as a terrier for the next part. While the larger dogs are in bow position, the small one starts at one end and walks under their rear legs.
Trick is to keep the large dogs from lying down.
This takes great concentration and muscle control by the large dogs. This is usually a simple one to teach if your dog likes to bark at you. Trick is to get her to do it on command and from distances. First decide on a hand signal that is not similar to any other. Some handlers think this looks more like a mouth opening and closing.