High/Scope was originally created for at-risk urban youth. High/Scope emphasizes individualized attention, and is especially good for children with developmental delays, since it is tailored to meet each individual student's level and pace. The day is divided into blocks of time, some small group, some large group. Each day starts with a plan-do-review sequence: first, kids plan what they will do for the day (who they will play with, what areas they will visit, which materials they will use), then they have an hour of work time in which to carry out their plans, and finally they discuss what they've learned and done. Computers are a key component in the classroom.
Reggio Emilia shares some of the values of the better-known Waldorf and Montessori schools, but it's not a philosophy with a set system of beliefs. Rather, it's an approach based around certain fundamental values about how children learn, and has a lot to do with creating an environment for children to explore and do self-directed learning activities.
This info was taken from the following two articles. Hope this helps!