Verb conjugation of "coûter" in French

I have considered the option to bring my friends from other social networks and invite them to join here. They can develop better language skills here. I'd love to pursue that goal, but I want to write in English.
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 have not managed to contact you. And please write me only to the Vocabulix inbox and not directly to my other email addresses? When is the best time to reach you? For me anytime is good.