From any small time school to IIT, IIM or Harvard, each class (in fact each subject) has its exceptionally bright students (thatare quick to understand what is taught), the ones that are mildly interested and the ones that find it really hard to even get the basics right.
In most cases such as this, a teacher teaches a lesson expecting all of the above 3 categories to learn at one go, at the same speed. This in turn, draws one or the other category further away from the topic. In Highbrow each class will have an individual library and Laboratory, which would always be stocked with books and tools related to the topic taught by the teacher. So in a typical class, where the teacher finds students that understand the lesson easier than others, he/she would move that group to the library corner and give them some more advanced/ challenging tasks to do, using books. The laboratory will be used to explain topics in a practical manner. This arrangement would ensure maximum learning for each child to the best of their interest and caliber.
Also, at Highbrow we have a format of just 25 students per-class, and students are taught in groups of three based on their attributes and inclinations. Due to this, our teacher-student ratio is high, in order to ensure each student gets individual attention.