I'm a first-year Stats teacher with no previous experience with Statistics software. My question is about technology packages available for Macs. I have been unsuccessful in loading DDXL and ActivStats on my MacBook Pro. It looks like the operating system won't support these "old" software packages. My preference is to find "free" software, or even some handy online applets if it comes to that. Our school's computer lab has PCs, but I'd like to demonstrate how a program works in the classroom before heading off to the lab.