Perhaps some of you are looking for a Latin Grace before Meals for your Thanksgiving celebration. Not every Latin teacher will be able to use this in his or her classroom, but every year, there certainly are requests for a grace.
The following is a well-known blessing:
"Benedic nos Domine
et haec tua dona
quae de tua largitate
sumus sumpturi
per Jesum Christum
Dominum nostrum
Amen."
("Bless us, O Lord,
And these they gifts
which from your bount
we are about to receive
through Jesus Christ
Our Lord
Amen.")
A different version of the above prayer as well as a number of other traditional graces and blessings in Latin can be found at Queens College, Cambridge University's website.
It's possible that you might want to serve some authentic Roman recipes for Thanksgiving, but it's probably more likely that you'd serve a Thanksgiving Cornucopia. (Cornucopia derives from the Latin cornu, meaning horn, and copia, meaning plenty. The lesser Roman divinity of luck, Fortuna, was often portrayed with a cornucopia in one hand and a rudder in the other hand.)