A system of BASIC and word processor computer programs has been developed to produce physics problem assignments having a different set of individualized numerical data for each student. It enables the giving of credit for homework in large class sections by reducing copying and by minimizing the effort required to grade assignments. The BASIC programs generate data and answers for each student. The word processor is used to produce the raw text of the problems, merge the text with the data, and print the resulting assignments. The system prints the student assignment sheets, instructor data and answer lists, and an instrument for rapid grading. A test of this system in two different components of a general physics course is described.