Teaching an object-oriented CS1 -: with Python

ABSTRACT

There is an ongoing debate regarding the role of object orientation in the introductory programming sequence. While the pendulum swings to and fro between the "objects first" and "back to basics" extremes, there is general agreement that object-oriented programming is central to modern software development and therefore integral to a computer science curriculum. Developing effective approaches to teach these principles raises challenges that have been exacerbated by the use of Java or C++ as the first instructional language.

In this paper, we recommend Python as an excellent choice for teaching an object-oriented CS1. Although often viewed as a "scripting" language, Python is a fully object-oriented language with a consistent object model and a rich set of built-in classes. Based upon our experiences, we describe aspects of the language that help support a balanced introduction to object orientation in CS1. We also discuss the downstream effects on our students' transition to Java and C++ in subsequent courses.

REFERENCES

• 1: Eric Allen , Robert Cartwright , Brian Stoler, DrJava: a lightweight pedagogic environment for Java, Proceedings of the 33rd SIGCSE technical symposium on Computer science education, February 27-March 03, 2002, Cincinnati, Kentucky
• 2: Owen Astrachan , Kim Bruce , Elliot Koffman , Michael Kölling , Stuart Reges, Resolved: objects early has failed, Proceedings of the 36th SIGCSE technical symposium on Computer science education, p.451-452, February 23-27, 2005, St. Louis, Missouri, USA
• 3: Frances Bailie , Mary Courtney , Keitha Murray , Robert Schiaffino , Sylvester Tuohy, Objects first - does it work?, Journal of Computing Sciences in Colleges, v.19 n.2, p.303-305, December 2003
• 4: Douglas Blank , Lisa Meeden , Deepak Kumar, Python robotics: an environment for exploring robotics beyond LEGOs, Proceedings of the 34th SIGCSE technical symposium on Computer science education, February 19-23, 2003, Reno, Navada, USA
• 5: Kim B. Bruce, Controversy on how to teach CS 1: a discussion on the SIGCSE-members mailing list, ACM SIGCSE Bulletin, v.37 n.2, June 2005 [doi>10.1145/1083431.1083477]
• 6: Kim B. Bruce , Andrea Danyluk , Thomas Murtagh, A library to support a graphics-based object-first approach to CS 1, Proceedings of the thirty-second SIGCSE technical symposium on Computer Science Education, p.6-10, February 2001, Charlotte, North Carolina, United States
• 7: Stephen Cooper , Wanda Dann , Randy Pausch, Teaching objects-first in introductory computer science, Proceedings of the 34th SIGCSE technical symposium on Computer science education, February 19-23, 2003, Reno, Navada, USA
• 8: Wanda P Dann , Stephen Cooper , Randy Pausch, Learning to Program with Alice, Brief Edition, Prentice-Hall, Inc., Upper Saddle River, NJ, 2006
• 9: Rick Decker , Stuart Hirshfield, The top 10 reasons why object-oriented programming can't be taught in CS 1, Proceedings of the twenty-fifth SIGCSE symposium on Computer science education, p.51-55, March 10-12, 1994, Phoenix, Arizona, United States
• 10: Zachary Dodds , Christine Alvarado , Geoff Kuenning , Ran Libeskind-Hadas, Breadth-first CS 1 for scientists, Proceedings of the 12th annual SIGCSE conference on Innovation and technology in computer science education, June 25-27, 2007, Dundee, Scotland
• 11: A. B. Downey, J. Elkner, and C. Meyers. How to Think Like a Computer Scientist: Learning with Python. Green Tea Press, Needham, MA, 2002.
• 12: Ann E. Fleury, Programming in Java: student-constructed rules, Proceedings of the thirty-first SIGCSE technical symposium on Computer science education, p.197-201, March 07-12, 2000, Austin, Texas, United States
• 13: T. Gaddis. Starting Out with Python. Addison-Wesley, 2009.
• 14: Michael H. Goldwasser , David Letscher, Object-Oriented Programming in Python, Prentice-Hall, Inc., Upper Saddle River, NJ, 2007
• 15: M. Guzdial. Introduction to Computing and Programming in Python: A Multimedia Approach. Prentice Hall, 2005.
• 16: Joint Task Force on Computing Curricula. Computing Curricula 2001: Computer Science Final Report. IEEE Computer Society and the Association for Computing Machinery, Dec. 2001. http://www.computer.org/education/cc2001/final.
• 17: M. Kölling, B. Quig, A. Patterson, and J. Rosenberg. The BlueJ system and its pedagogy. J. Computer Science Education, 4(13):249--268, Dec. 2004.
• 18: Essi Lahtinen , Kirsti Ala-Mutka , Hannu-Matti Järvinen, A study of the difficulties of novice programmers, Proceedings of the 10th annual SIGCSE conference on Innovation and technology in computer science education, June 27-29, 2005, Caparica, Portugal
• 19: John Lewis , William Loftus, Java Software Solutions: Foundations of Program Design, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1997
• 20: Atanas Radenski, "Python first": a lab-based digital introduction to computer science, Proceedings of the 11th annual SIGCSE conference on Innovation and technology in computer science education, June 26-28, 2006, Bologna, Italy
• 21: David Ranum , Bradley Miller , John Zelle , Mark Guzdial, Successful approaches to teaching introductory computer science courses with python, Proceedings of the 37th SIGCSE technical symposium on Computer science education, March 03-05, 2006, Houston, Texas, USA
• 22: Richard Rasala , Jeff Raab , Viera K. Proulx, Java power tools: model software for teaching object-oriented design, Proceedings of the thirty-second SIGCSE technical symposium on Computer Science Education, p.297-301, February 2001, Charlotte, North Carolina, United States
• 23: Stuart Reges, Back to basics in CS1 and CS2, Proceedings of the 37th SIGCSE technical symposium on Computer science education, March 03-05, 2006, Houston, Texas, USA
• 24: Richard J. Reid, The object oriented paradigm in CS 1, Proceedings of the twenty-fourth SIGCSE technical symposium on Computer science education, p.265-269, February 18-19, 1993, Indianapolis, Indiana, United States
• 25: Eric Roberts , Kim Bruce , James H. Cross, II , Robb Cutler , Scott Grissom , Karl Klee , Susan Rodger , Fran Trees , Ian Utting , Frank Yellin, The ACM java task force: final report, Proceedings of the 37th SIGCSE technical symposium on Computer science education, March 03-05, 2006, Houston, Texas, USA
• 26: Christine Shannon, Another breadth-first approach to CS I using python, Proceedings of the 34th SIGCSE technical symposium on Computer science education, February 19-23, 2003, Reno, Navada, USA
• 27: Mark C. Temte, Let's begin introducing the object-oriented paradigm, Proceedings of the twenty-second SIGCSE technical symposium on Computer science education, p.73-77, March 07-08, 1991, San Antonio, Texas, United States
• 28: Ian Utting, Problems in the initial teaching of programming using Java: the case for replacing J2SE with J2ME, Proceedings of the 11th annual SIGCSE conference on Innovation and technology in computer science education, June 26-28, 2006, Bologna, Italy
• 29: John M. Zelle, Python Programming: An Introduction to Computer Science, Franklin B, 2003

INDEX TERMS

Primary Classification:
  K. Computing Milieux
  K.3 COMPUTERS AND EDUCATION
      K.3.2 Computer and Information Science Education
          Subjects: Computer science education

Additional Classification:
  D. Software
  D.1 PROGRAMMING TECHNIQUES
      D.1.5 Object-oriented Programming
  D.3 PROGRAMMING LANGUAGES
      D.3.2 Language Classifications
          Subjects: Object-oriented languages

General Terms:
Languages

Keywords:
cs1, object orientation, python