The teaching of programming to mathematics students has been a thorny pedagogical issue for many years. Should the mathematicians do it, or the computer scientists? Here we outline Bath's solution to the issue, which is "both, in close collaboration, to an interdisciplinary syllabus". This solution (using MatLab) is now in its fifth year, and is taught to 300 students/year. It has been received well by the students, and by other lecturers who can build with confidence on the skills learned in this course.