The Advantage of Teaching Relativity with Four-Vectors, Robert W. Brehme, Am. J. Phys. 36, 896 (1968)
An argument is given that teaching relativity from the beginning using four-vectors provides a powerful and correct way of thinking that also conforms to everyday methods of making measurements. In particular, it is pointed out, that the emphasis on the relativistic mass is both undeserved and misleading.