To get the best image quality from a digital camera, you need to shoot in camera raw (.dng). Raw files contain more detail compared to a jpg file. I'd shown before and after images to my Photoshop class, and demonstrated how to use Camera Raw but students tended to accept the image basically as it stood.
Calculus III covers material from calc I/II, but in 3D. One part of calc III is to graph in 3D. A program called Maple is used to draw the graph, then students draw this on their exam. For 6 years, a lecture approach was used to cover this topic. Overall, students did not do well on this part of the exam (approximately C-D average). Students had no comprehension as to why the graph looked the way it did and were not able to draw basic shapes.