In each of the corners of your classroom, place a sign with 1 of the 4 partitives (du, de la ,de l', des). Go through these slides and with each problem, have students walk to the corner they think best completes the sentence.
Hints: This tends to engage most students, but generally there are several who simply follow the crowd. There are 2 ways to nip this in the bud. 1) call on these students to offer a defense to the class for their response 2) quietly instruct a couple of students considered to be the smartest by their peers to intentionally choose the INCORRECT response...a harmless way to shame the followers.