Most of what is covered in geometry was developed by an ancient Greek mathematician named Euclid (pronounced yoo-clid)a few THOUSAND years ago. Obviously no computers or Ti-84's, this guy barely had paper. So why do we need any of that fancy stuff? Simple answer is that we don't.
We're going to do something different this year - we're going to get back to basics and try to discover the postulates and theorems that Euclidean Geometry is based on. Think about it - would you prefer I just tell you everything and test you to see if you heard/remembered it, or do you think it would be better if you figured it out for yourself?
Is it going to be hard? Hard to say. It's going to be different, but if you give it a chance and put in the effort, it will be worth it.