I'm going to take a stab at this one. Please debate whatever I have here, but I think it's fairly accurate.
Framework - A framework is a support system. It may not be the whole picture, but it provides a strong base for building upon. I always liken it to the frame of a house. It can stand on it's own, but it's really there to be added to. However, you can never just take it away.
Standard - Very rigid, generally accepted methods of doing something. Very specific. A standard will usually only include a single element (ie do this, this way) whereas a framework or model defines a system of doing things.
Model - This is the process of how we get from point A to point B. If we were using the house analogy again, if we were a builder then we would construct houses the same way every single time. Other builders might to it different ways, some might be faster, some might produce a better quality product, but they all arrive at the destination. The model is just the path we take to get there. These are our processes. We aren't going to be building one house one way and another house completely different, right?
9 out of 10 people I prove wrong agree that I'm right. The other person is my wife.