Try to make the instruction time erotic and lighthearted. Being too serious will only make you both more tense. There are two options for you. You can either masturbate while your partner watches or masturbate while using his hand. You can also combine both of these by starting using your hand alone, then taking his.
Many men have a fantasy of watching a woman masturbate.
This highly erotic scene will surely excite your partner but rest assured, he will also learn your needs and desires. He will be highly aroused and much more willing for the next teaching session.