You can easily see data from different levels of your organization, like Schools and Classes, by using an organization level filter on your Dashboard.
You can find the organization level filter of your Dashboard between the Overall Stats and Historic Usage sections.
Your Dashboard is dynamic, and when you use the filter to select a level of your organization, the data will display information related only to that level. Once filtered to a specific school or classroom, you can further drill down on the data by clicking on the classroom or specific student name.
For more information about navigating this data, please see the following article: