Undergraduate / "the school choir" - Elaborate on One of Your ExtraCurricular Activities [6]

Please criticize my essay constructively for me. I would be very grateful if someone could criticize it ASAP. Thanks.

He lifted up his hands with a dexterity only a few people could have had and then motioning to the group on his left and those on his right, he looked directly at those in front of him and then gave us all the signal to start singing. The performance of the school choir that evening was as splendid as all our previous performances had been. However, we couldn't have achieved this feat without the constant effort we put into our practice sessions. We meet every morning from Monday to Friday and then practice for about an hour before we go to our classes for lessons. I used to sing in the bass part. Our choir master is really a perfectionist and he always ensures that we have all learnt our parts perfectly before we perform at any function. I really enjoyed being part of the school choir.