Learn the fundamentals of quantum error correction in this comprehensive tutorial lecture presented at IPAM's Winter School on Quantum Error Suppression, Mediation, and Correction at UCLA. Delivered by Louis Golowich from the University of California, Berkeley, the first part of a two-part series explores essential concepts in quantum error correction, providing valuable insights for researchers and students in quantum computing. Recorded in February 2025, the 91-minute presentation serves as a foundational resource for understanding error correction techniques crucial for building reliable quantum computers.