My son attended classes with Speech Inc, Yitian, based at Forum Shopping. She charges $170 per hour. She is very experienced and has a masters in Speech. My son was with her for over 3 years and found her to be very effective. She is not cheap, can be quite firm with parents (some do not like her style) but the firm approach works in the long run, which I found to my son’s benefit. She is totally booked up though.