SIS Cilegon (Official Account) on Instagram: "Wondering what CCAs you can join at SIS Cilegon in this academic year? Here’s our CCA program, where after school is full of fun and learning. Designed to go beyond the classroom, our activities give students the chance to explore their passions, build new skills, and grow with confidence. From sports to science, every CCA experience helps our students uncover their potential and shape their journey ahead. Let your child discover their true potential