Located in a building right on Manly beach, Manly Surf School is Sydney's largest surf school. With a very friendly and experienced staff, surfers at any level can take beginner, intermediate, or advanced lessons. Their most popular lesson is beginner though, as with its location it is very convenient for tourists to take a lesson in an afternoon. Lessons are $50 each, and that includes the board, wetsuit, and instruction. The more lessons you take the cheaper they get. Private lessons are offered at $80 per lesson.
Lessons are available every day throughout the year at 9:00 and 11:00 AM, along with 2:00 PM lessons from November through March; each lesson is two hours long. Manly Surf School uses Softboards, which are surfboards made of soft foam rather than fiberglass/polyurethane which. Softboards are easier to balance on and will not bruise you quite as badly in a wipe out.
The instructors I encountered were great--typical Aussie guys completely stoked about surfing. They were very friendly and gave a good surf lesson; they knew what they were doing!
I actually don't know any other options for surf lessons at Manly, but honestly I don't think there needs to be another option. The prime location along with everything I mentioned above makes for a great surf lesson. Give it a go--you won't regret it!