Dear D.,
Something is bothering your child. Of course, he will not tell you right away. You and your husband need to spend some quiet time with him, like walking, fishing, something like that, and in the process talk to him about what he likes to do , what his favorite things are, and if he has someone special that he admires, just try to get to know the real inside child. You will find out why he is hesitating about going to school. Some people handle problems inside themselves, and eventually get depressed and still do not solve the problem. He may be one of those. It is great that your family has been together for so long - you have learned a lot about each other, and now you need to get into your son's mind so that you can help him avoid the stumbling blocks to his being at peace in the world.
Of course all of this will take a long time, and he needs to get up LIKE TOMORROW on time. So try cook something that smells good to him, bacon, french toast, cocoa, or a cinnamon and nutty breakfast cake. Also, wake him at least 45 minutes earlier, and don't tell him that you are doing that. Yelling is not fun for anyone to hear or to do. Make the morning better for yourself in some way. Treat yourself to a happy morning.
Get the car ready to go, so that the few moments that it takes to get it our of the garage and pointed in the right directions are accomplished early. I know, I 'talk' too much. Oh, well.
Sincerely, C. N.