Lose your marker and win the header. Peel off the defender with a sharp movement, attack the inswinger first and head it down into the far corner.
As the base, but a defender marks the attacker. Emphasise a sharp movement to lose the marker, attacking the ball first, and winning the physical duel to head it down at goal. Rotate all roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.