Typical grade school teachers spend their days on their feet, rushing from one crisis to another, trying to help mainstreamed kids with serious disabilities, kids with chaotic home-lives and resulting learning and behavior problems, political mandates to teach to a standardized test regardless of what they think the kids really need, and so on. They don't feel they have time to figure out simple user interface problems like where did all these IE windows and tabs come from, let alone learn a new software suite.