Excel assignments were used as extra credit in an intermediate algebra course. Ninety percent of the students had a home computer and seventy per cent were familiar with Excel. There was not a significant linear correlation between the amount of Excel that the students performed and their achievement in algebra. One-third of the students did less…

Computer operations involving complex numbers, essential in such applications as Fourier transforms or image processing, are normally performed in a "divide-and-conquer" approach dealing separately with real and imaginary parts. A number of proposals have treated complex numbers as a single unit but all have foundered on the problem of the…