In this pair drill, students practice the difference between bueno and bien by reading sentences to each other in which they must orally fill in the blanks with the correct form of bueno or bien. One students has the sentences with blanks, the other has the answers. This way students can check their partners.
To use this pair drill, print enough copies for 1/2 of your largest class. Cut each page in half. Put students in pairs giving each person in the pair half of the sheet. When students get to the bottom of the sheet, they switch papers and do the drill again. In my classroom, students must repeat the drill until they are instructed to stop.