Students love hands-on so there were quick to learn graphical methods (Smith Chart), with some help learned MATLAB use for transmission lines.  Students were eager to learn how to validate their answers, like MATLAB vs Smith Chart, use direct methods vs using auxiliary functions to calculate fields and get the same answers.
Most of the students were able to find their errors and correct it and leave their answers in a pristine state that was a joy for the instructors and the TAs to read. The students also had exquisitely beautiful handwriting that made their equations stand out in a sea of writing.