EFFECTIVE Feedback

The students at our school had to complete a survey about their teachers at the end of first semester. It had numerous questions on it with one being, "Does your teacher enjoy his or her job?" What a great question! Thankfully, my survey results came back strong in that area. One area that I showed weakness in was timely and effective feedback. At first I was confused as I thought about how quickly I grade assignments, get those grades posted and return work to my students. My "timely" feedback, I believe, has been strong.  I think my greater weakness stems from effective feedback. The benefit doesn't come with what a student has gotten wrong on a test, but WHY have they gotten it wrong. Is it poor study habits, or lack of understanding?   One of the ways that I really want to improve this semester is to spend time reviewing tests together. Helping students understand why their answer was not the best answer, I believe, will be much more effective feedback than just a numerical grade.