In Holland all zoos are using protected contact (pc), except for the females and offspring in Rotterdam. But Rotterdam is changing to pc.
PC is the savest contact system; the elephant and his caregiver are not standing in the same room, there is always a barrier between them. This means that the elephant have the choise to go the the caregiver if he wanted to, or not.
Training sessions can be cancelled by the elephant. The caregiver has no means to force the animal. Of course they uses a lot of little snacks to get the attention of the animal, but sometimes - like humans - the elephant has an off day, and he refuses to come whatever the caregiver tries.
For more safety, the caregiver uses long sticks to train the elephants, and to make sure he's out of the reach of it's trunk. Of course the sticks are not used to hurt the animals but to hit them gently, just to attend the animal.
The basic principles are simple: hit the elephant on a leg means: lay your leg on the fence. The trainer hit the elephant with one stick on the head: the elephant has his attention. Then hit with the other stick on the leg. If he acts right, the caregiver makes a sound (often by a clicking device), and the elephant recieved a little treat (like an apple).
There are also some short vocal commands like "turn", "ear", "final", but the caregiver never shouts to the animal.
And always behind a fence! The caregiver should interfere to the minimum. Only short training sessions, and only for medical use or daily care.
It's so easy to learn an elephant because they are very smart. And I can not understand why zoos are going on with hands-on contact, while pc is proven to be the best. Ask Alan Roocroft!
Here are some samples of a training with African elephant Tooth of Ouwehands' Zoo. Notice the fence, the bucket with fruit. Also notice that this elephant is separated from the rest. He is standing in a small pen or paddock. But if he chooses not to come to a training, he simply will not enter the paddock!
I was very pleased to withness such a training! (The photos are taken by me and the caregiver gave his permit to show it on the internet.)