In a one-step sparring/wrist grip practice, we will have maybe 5 or 6 pairs of people. Different pairs will be working on different sets. The instructor will tell one pair to practice their set and instruct another pair in their new set. If I know the grip/one-step and my partner doesn't, I will tell him, "Step left, block right, grab the wrist, roundhouse kick to the solar plexus, etc." We help one another out that way. Absolutely, it is the instructor's job to come over and make sure we are executing the moves correctly. The instructor does come over and review how we're progressing.
Perhaps this is where we're having some miscommunication.
This isn't you teaching the technique to the other student; it's two training partners working together to learn a technique. I expect training partners to do that. Many, many is the time that I've been working with a partner and we've both "corrected" each other about what we thought we saw... That's working together. I want you to pass along to me that it was "full step, pivot, block" or whatever to refresh me if I freeze or am off track when we're training. But, a relatively new student shouldn't be teaching the technique from scratch.