I will happily admit to using Wolfram Alpha as a tool in my daily work. It is great for finding conversion factors without having to look them up or multiplying different factors yourself, which is very prone to errors and resulting order of magnitude issues. For actual math, Mathematica is both faster and more reliable.

This article brings back the idea that khan academy suggested where homework was done in class and class work i.e. Watching khan academy videos was done at home. In this way, students would not be able to,call upon Mathematica or other tools to cheat.

I am not sure Khan academy was first to suggest this. The approach is similar to flipped classroom and you can also add quizzes to your videos to make them more interactive (I have done this) and reduce the risk of students alt-tabbing to facebook.