Icahn Charter School 1 uses the Core Knowledge curriculum in an intimate environment featuring small classes (18 students per class) in a small school. With an extended school year of 192 days and an extended school day, the school has more time for instruction and reduces the loss of mastery over school vacations. The school employs a variety of real life applications and hands-on learning opportunities to make the curriculum "immediate" for children. It maintains high standards for instruction through ongoing and professional development. The school stresses the importance of parental involvement to support the curriculum. The school has numerous after school academic, recreational and sports programs as well as Saturday Academy classes in ELA and Mathematics.