Text fields on a PDF that are not in the tab order

I'm probably just overlooking this in the options, but is it possible to have some text fields on a form that do not have to be in the tab order? I've attached the document that I am working on here. Our client wants the Fall and Spring categories to follow the tab order, but wanted the Summer sections left out but still be able to be filled in by manually clicking. I've adjusted all of the fields to follow in order, top to bottom. 

Can I add fields in the summer sections without them showing up in the tab order? Any help would be appreciated. Thanks!