I fish Sinking Inchworms (the old name & no tail) like a terrestrial, just like you would fish a beetle pattern. You walk upstream and plop it down in likely looking pools, pockets, near cover, etc. Don't use a "bobber."
The trout often hit it on the drop, just like a beetle or other terrestrial pattern.
But they sink, so you just let them drift on down and watch for a strike. Trout often hit them hard.
You will see inchworms hanging from the trees from when the leaves first appear until the leaves drop in the fall.
In the early season the inchworms are small. But in the summer they get much bigger. They must be a very tasty snack for the trout.
I think trout in streams with a tree canopy get really keyed in on inchworms in the summer. They don't just take the Green Inchworm, they attack it.