Pascal plus data structures, algorithms, and advanced programming (3rd ed.)

Advanced placement-plus in computer science: a summer institute at the University of Tulsa

SIGCSE '87 Proceedings of the eighteenth SIGCSE technical symposium on Computer science education

Teaching the abstract data type in CS2

SIGCSE '89 Proceedings of the twentieth SIGCSE technical symposium on Computer science education

Pictures as invariants

SIGCSE '91 Proceedings of the twenty-second SIGCSE technical symposium on Computer science education

Hierarchies of programming concepts: abstraction, generality, and beyond

ACM SIGCSE Bulletin

A top-down approach to teaching programming

SIGCSE '95 Proceedings of the twenty-sixth SIGCSE technical symposium on Computer science education

Computer programming in high school vs. college

SIGCSE '96 Proceedings of the twenty-seventh SIGCSE technical symposium on Computer science education