The Nuts and Bolts

Here's a post from early in my first semester of using TBL in ENGL 1311 (now called WRIT 1311):
In team-based learning, students take periodic "readiness assessment tests" to determine how well they have prepared (by doing assigned reading) for the next major unit/topic/assignment. It is important that the tests be graded and returned immediately so that the instructor can immediately clarify concepts/material that students had difficulty with.
To allow for immediate evaluation, RATs usually consist of 15-20 multiple choice questions. But even brief multiple choice tests take some time to grade, unless you have a Scantron machine in your classroom. TBL practitioners have come up with various solutions. Some use transparency overlays; others give students scratch-off answer sheets.
And some use a cordless drill. I'll let the photos speak for themselves.

The student fills in a test answer sheet.

The instructor's key. Shaded cells are correct answers.

The primitive Scantron machine

A big stack of completed test answer sheets, with the instructor's key on top.

The instructor drills through the correct answers.

Instructor quickly grades student's test answer sheet.