In Skolon you have one - My Collection - for each school you are connected to. The collection is unique per school as it handles your licenses, groups and classes for the particular school you are logged in to. Therefore, the collections may have different tools.
Should it be that you have the same tools at several schools, it's still important that you are logged in to the right school to get the right class and group affiliation inside the tools.
How to change school in Skolon
To switch between schools inside Skolon, simply click on the school name in the upper left corner.
When you click on the name, you will see the options you have to choose from.
Are you missing a school that you are supposed to be connected to? Contact your teacher or you Skolon-administrator