HP Machine Imaging

I am new to the PC world and not real experienced with imaging. I manage a K-12 Educational Institution and we have about 100 HP machines of all difference varieties. I would like to make images of m laptops for easy repair. What do you suggest for a novice tech guy? I have 15 laptops right now that need to be re-imaged and would like to set one up, create an image and then image them all the same.

What programs do you recommend?

Thanks…..Mike