Teaching CS50 with AI - David J. Malan

CS50 integrates artificial intelligence into its curriculum through the "CS50 Duck," a virtual tutor designed to provide pedagogical support while maintaining academic integrity. By implementing strict system prompts, the tool acts as a guide rather than an answer key, helping students debug code and understand complex concepts without bypassing the learning process. This system leverages large language models via APIs to offer 24/7 virtual office hours, effectively scaling personalized instruction to a global student body. Quantitative data indicates that students have rapidly adopted this conversational interface, leading to a 75% decrease in traditional asynchronous question-and-answer submissions. This shift demonstrates that AI, when constrained by educational guardrails, successfully approximates a one-to-one teacher-student ratio, amplifying human impact and providing iterative feedback that improves student performance and code design across diverse educational environments.