['I helped tutor my nephew in algebra. He ended up passing with an A. That made me very happy.', 'You sound like a great uncle!  You must be proud of him!', 'I am very much so. I think it gave him the boost to continue making good grades.']
That is great that you are there to help him out!
I helped tutor my nephew in algebra. He ended up passing with an A. That made me very happy.