LEED for Schools, or LEED NC ?

Hello, I was wondering if I could get your opinion on which LEED Scheme I should use. Our client wants to entirely refurbish a school block that is 100 years old. Windows, HVAC systems, flooring and other items will be amended. In addition the client would like to add to the existing block a new part that will constitute approx one third of the total block. The block will serve as classrooms and a learning center for grades 7, 8 and 9. Which LEED scheme should I use, knowing that 2/3 of the block will be refurbished and 1/3 of the block will be completely new. Is it LEED for schools for the whole building? Thanks for your help,