If you do happen to have a computer without a CD drive you can purchase an external one that connects to the computer via the USB. I have one here on my desk that I use almost every day. We live in the country where the internet isn't always reliable, so for homeschooling I always opt for DVD curriculum over the streaming! Especially important when road schooling with an RV. We took a 3 month road trip 1 1/2 years ago and the internet in RV parks is terrible. I was really glad we had the CD drive!