Having content organised in My School's Content means that students and teachers can easily access material that is suitable for their ability, and know where to look to find accelerated or catch up material.
Navigate to the Content Library, from your Control Panel.
Switch from Browse to Edit mode, if necessary.
From here, you can either add content to existing modules or, if necessary, create new modules using the Create a new... button. This will enable you to rearrange content between folders.
Find the list or folder that you want to rearrange and drag it into the required module. Choose whether you'd like the list to remain in its original location by selecting Duplicate Lists, or completely move to the new location, by choosing Move Lists.
You can also organise lists in folders for each year level.