In my blog (link in signature) the third entry down should be about breeding/mating. I would link to it but I can't on my tablet.
You can read up on it but know that it involves a lot of preparation and knowledge, so we recommend that no one just leaps into this. It's not like breeding geckos where you get 2 eggs and that's it. Chameleons can lay 50+ eggs, which can take 9+ months to hatch, and who will eat a lot when they hatch. Not to mention the health of the mother, who needs to be in superb health and on an excellent diet/supplement schedule! And it can be very expensive. So lots to read up on!