This LiveMath notebook can be used in many different ways. One way, of course, is to print it out and make handouts and transparencies for classroom use.  Another possibility is to have the students number the steps in a printout and explain the steps and the rules involved in each step. Give the students similar problems for an assignment.  Another option is to create a notebook similar to this with only the first few steps showing.  This would be a homework starter to get them "going".   In this notebook changes can be made in the first line. Hint: after you make a change, Ctrl Z will undo it.  This works in all notebooks.  \ is the keyboard short cut for entering a radical.