Personalized Feedback

When you are grading, no when you are going over tests do you run through the problems on the board for all the students to see, even the ones who got the question right?

No teacher has time to personalize feedback in math class.  Or do they?  If you record yourself when going through a test you can personalize each test as you go through the test.  You can say, "Wow, that was great on that question." or "Oh, you just forgot a decimal place." or lastly, "You need to explain more here on number 6, I did not get your thinking."  This not only personalizes each test, but your students get use to your thinking and knowing what you want to show on the test.  They can hear your thinking over and over again if they need to retake or take another test it would be a great way to study what they missed.

Since my HTML does not like me right now I will just copy the address to the video and article.
https://www.teachingchannel.org/videos/student-feedback-through-technology

This recording device was through an Apple computer and used for student's iPods.