The chart below illustrates why change (especially in a school) never seems to work. Take any policy/workshop that your school has tried to implement and chances are if it didn't work, the chart below explains why. The ingredients listed in the chart, (vision, skill, incentives, resources, and an action plan), must all be present for any change to successfully take place.
Take some time to really study the chart and I think you will understand. The next step may be to bring this to the attention of your school administration.