Codechella: Multi-user program visualizations for real-time tutoring and collaborative learning. - Philip J. Guo; Jeffery White; Renan Zanelatto (VL/HCC, 2015)

Toward a domain-specific visual discussion forum for learning computer programming: An empirical study of a popular MOOC forum. - Joyce Zhu; Jeremy Warner; Mitchell L. Gordon; Jeffery White; Renan Zanelatto; Philip J. Guo (VL/HCC, 2015)