@WRESPTO You can create categories and assign specific items to a specific category. So you could create one category for school events and one for school ticket sales — and assign the items for each specific event/ticket to each category.

To create a category from the Point of Sale app:

1. Tap the three horizontal lines in the upper left
2. Tap Items and then tap Categories.
3. Tap Create Category > enter a name for your new category.
4. You'll see a list of your current items and you can select every item that you want to be associated with that category.

You can also create categories from your online Square Dashboard. Keep in mind it's not possible to assign a category to a transaction that was completed in the past! 

If you have any questions about this please let me know!