During March 2026, Lary Mak developed three new data structure labs for the freeCodeCamp/freeCodeCamp repository, focusing on queue, linked list, and stack implementations. Using JavaScript, Lary designed each lab with array-based or seed data structures, comprehensive automated tests, and helper utilities to ensure reliability and maintainability. The labs covered core operations such as enqueue, dequeue, insertAt, and pop, providing students with practical, hands-on experience in algorithms and data structures. By expanding curriculum coverage and improving test infrastructure, Lary’s work enabled faster onboarding for contributors and reviewers while deepening learners’ understanding of foundational programming concepts and automated testing practices.