You can apply by holding a doggy biscuit and throw it in the crate and ask him to go for it
. This should be applied when playing with him. When he get the job done, repeat this process like 3 to 4 time, then you can praise him for the job well done. This will make him understand the purpose of the crate. Out or in? So many people ask this question. They always feel like when using the crate training methods you should let your puppy out of the crate when humans are around. But on the contrary, I advice you should train you puppy in the crate whenever you are in the room. This will make him not to fell human absence when in the crate. Remember not to keep your puppy too long in the crate, it is always difficult to control them self when trying to do their business.