templates-I need to create a graduation party invitation. Where can I find a template?

I'd suggest doing an internet search for "invitation templates Pages Mac" and exploring. I'm not at a Mac at the moment but have you checked all the available included templates for any greeting card templates? You may be able to adapt one.

Yes, Pages is the application.

A quick internet search turns up this:

https://itunes.apple.com/us/app/templates-for-pages/id444453991?mt=12

It would be helpful if you let us know what application you're planning on using.