In the beginning, you can let dog jump over the board 30-40 cm high. Take your dog to the place 5-6 steps away from the board, then run with him toward the board, when the dog is close to the board, say command "jump". At the same time, lift and pull the leash toward the board, if he succeeds, give him a reward at once.
Such training should be repeated several times continuously, Besides that, you can also entice him to train with food. For example, you can put food in the other side of the board, dog can see but not eat the food, so he must jump over the board for the food, especially when is hungry.
When he is skilled to jump, you can only use command and gesture to train him, rather than run with him, as well, you can gradually increase the height of board or train him to jump over barrier, ring and entrenchment.