Properly worded graduation party invitations should clearly give key party details, such as the time and location of the event. A mention of the graduate's accomplishments and a look toward the future are also acceptable.
However, the focus of the invitation should be on giving guests clear instructions so that they can arrive on time at the right place.
The theme of a graduation party is the celebration of a graduate's work and accomplishments, but additional themes can be conveyed through the wording of the invitation. For example, use of slang or jokes in the invitation tells guests that the party is a laid-back affair. Similarly, more formal wording or specific mention of a dress code will lead guests to expect a more formal affair. Writing the invitation to reflect the style of the party is a polite way to let guests know what to expect.
Above all, the wording of a graduation invitation should be upbeat and celebratory. Mention the school. Mention the degree. And it is okay to convey the family's pride. Exclamations are allowed! The graduate's years of hard work deserve recognition in the invitation as well as the party, because some on the guest list may not be able to make the actual event.