Have her help you...

"Miss O'Neil?"

Miss O'Neil looks at you as you flash your eyes. She is now under your control.

"You wish to serve and obey me", you say.

"I wish to serve and obey you."

You smile. "That's good. Now, you will change my grade and give me nothing but 'A's from now on."

"Yes."

"From now on, you are my ****, and you will obey my every command."

"Yes, I am your ****."

"Good. Now, there are plenty of other girls here who should be my slaves just like you are. You will bring them to me so I can put them under my control."

"Yes, more girls should be your slaves. I will bring them to you."