Verb conjugation of "diversifier" in French

My husband wants to see the places his parents come from. They're from Michigan. And I'll take the opportunity to visit my brother in law in Carolina, he is 63 years old. Towards the end of the trip we will attend a conference.
Carl said that he would need a private tutor for his spoiled son. My opinion is that sometimes this is counter productive measure as it gives the pupil a feeling of being weaker then the others and may lead to discouragement.
I can already speak a little English but not too well. So I'm more cautious about making mistakes. I want to improve my English, because it is also good for your confidence and communication skills.