This 18-question circuit gives students exposure to and practice with this kind of standardized test question: "Suppose the operation x@y is defined as x + 3y. Evaluate 4@7." Progressive in nature, the circuit builds to include challenge questions towards the end.
To advance in the circuit, students must search for their answer. This keeps them engaged! Talking! Excited! My students do not get up when the bell rings if they are working on a circuit. This circuit can easily be made into an around the room scavenger hunt.
There is no answer key included because the answers are imbedded in the circuit (it is how students move from one problem to the next -- the problems are progressive in nature). The only prep the teacher needs to do is work the circuit ahead of the students to see what kind of guided notes/examples should be given before setting the students free on the circuit.
My colleagues and I check our circuits very carefully but should you ever find a mistake or get stuck, please do not hesitate to contact me at firstname.lastname@example.org.