Cobi (previously Popfizz Computer Science) is an online computer science educational service provider for students and teachers. Designed in collaboration with expert educators, Cobi offers a wide range of online student courses and self-paced professional development courses for computer science educators. Our team is determined to create effective CS learning solutions for teachers and students around the world. Cobi's holistic approach to teaching and learning is preparing students with 21st-century skills, and teachers with the professional development they need for beginner and next-level computer science training. Our courses are embraced by students and educators in classrooms across the United States. Learn more at https://gocobi.com.