Groove the back-post header. Get the forehead over the gentle serve and head it firmly back across into the mini-goal.
A server plays a gentle lofted ball to the back post and the striker heads it into a mini-goal, no keeper. Emphasise getting above and over the ball and directing it back across into the target. Keep the service easy until the technique is clean. Rotate the roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.