.png)
The CS4ALL Crew
Contact Us
We’d Love to Hear From You
.png)
Katerina E. Borrego
Founder and Executive Director
Katerina has been coding since the age of 10. She works with Scratch, Python, Unity, C#, and Java, and loves showing how fun and creative coding can be. Her journey began when she founded her own CS4ALL club in elementary school, driven by her belief that every child should have the chance to experience the excitement of coding. As the founder of CS4ALL, she is passionate about making coding accessible to every child, believing that quality and equitable education is essential for future success. Her mission is to inspire more kids to learn coding as a vital skill for the future. Today, Katerina is directly involved with both teaching and writing the curriculum that powers CS4ALL workshops.
As we expand, our vision is to bring these opportunities to other areas in Connecticut, across New England, and eventually nationwide.
Isabel Rancu
Isabel is a senior in Yale College studying Molecular Biophysics/Biochemistry and Data Science with primary coding experience in Java, R, MatLab, and Python. She is extremely passionate about teaching and designing course content. At Yale, she is Co-President of Code Haven, teaches for Slash, works as an undergraduate TA, and founded the Science x Civics Fellowship with Civics Unplugged. Throughout these experiences, she has focused on the intersections of science, pedagogy, and creativity to enhance the classroom environment for elementary, middle, and high school students, as well as current Yale undergraduates. Isabel joined the CS4ALL team in Spring 2025 and is directly involved in curriculum development as well as instruction capacities.
Cassie Wu
Instructional Fellow Director
Cassie is the current Woodbridge Fellow in the Office of the Secretary and Vice President for University Life at Yale. She graduated from Yale College in May 2025 with a degree in Economics, where she fenced for Yale and the Canadian National Team. At Yale, she also served as Finance Director for the Women’s Leadership Initiative and the Show Director for Yale College Figure Skating Club. These experiences deepened her passion for building communities and creating opportunities for others. Cassie loves helping teach kids coding and inspiring curiosity while showing how technology can be a tool for creativity and discovery.
