Performance of python CS1 students in mid-level non-python CS courses

Abstract

If you change the CS1 language to Python, what is the impact on the rest of the curriculum? In earlier work we examined the impact of changing CS1 from C++ to Python while leaving CS2 in C++. We found that Python-prepared CS1 students fared no differently in CS2 than students whose CS1 course was in C++, even though CS2 was taught in C++ and covered the same topics as in previous years. Was that an anomaly? What happens in the next tier of courses? When our CS1 was first changed to Python there were many students who had taken CS1 in C++ still in the system. The result is that there is a cadre of students with either CS1 in Python or CS1 in C++ moving together through our curriculum. This one-time occurrence is an opportunity to study the students with many variables fixed. Our next tier of courses is a C-based computer organization course, a C++ based object-oriented software design course, and a data structures course. We found that the students who started with Python fared as well as the CS1 C++ students. As before, the best predictor of performance was their college GPA. Python versus C++ CS1 preparation was not a predictor of performance in any course. We conclude again that in our C++ based curriculum changing CS1 to Python had no negative impact on student performance and did not require any significant change in those subsequent courses.