I just got this course and it has literally answered YEARS of questions I've had about the order of operations........why is this the first time there is a clear course online about this?! You won't find this level of depth on YouTube videos that's for sure. I know how to do the basics but this course goes BEYOND and gives you all these little scenarios that definitely stumped me but Tanya works through each problem beautifully and at a comfortable pace. Some of the practice problems are like brain teasers as well, I love it!