Training a horse to jump?
Set the jump blocks up near the fence, with a pole sloping either side off the blocks.
These poles will act as wings to keep the horse in.
If you don’t have jump blocks then milk crates or forty-gallon drums on their side will do.
If you do use drums, make them secure to stop them from rolling.
Remember, whatever jump stand you use, it must not interfere with the lunge line.
Lunge at walk first, then progress to a pole on the floor in a walk.
After a few circles in a walk as for trot and continue in trot over the pole.
Progress to a cross pole, working in trot in both directions.
If the horse breaks into a canter that’s fine.

Building a cross pole will encourage the horse to jump in the middle of the fence, as this is the lowest part of the jump.
Next lunge the horse over a straight bar, keeping the fence low, no higher than 2ft 3.