This is easiest with a box or counter that reaches to hip height, but you can do this against a wall. Bring your inside leg up partway or to a full march position and press your hip and knee into the box for the designated time and level of exertion, feeling the engagement from your standing leg glute. You may find that you need a soft hinge at the hips to feel the work in the right place for this exercise. The eventual progression is to be able to feel the glute all the way up in an extended standing hip position with your inside leg all the way up.