The SAMR (Substitution Augmentation Modification Redefinition) model is a framework used to evaluate the technology being employed (or that you'd like to employ) in your classroom. Basically, it offers a way for you to look at how technology integration might affect teaching and learning.
This is a free service and Is great for my Kindergarten students. It eliminates the need to type in any web address and I can tailor our classroom symbaloo page with all the places that we go for our learning. They can access this from our class laptops, iPads, or iTouch devices.