This 20-question circuit will keep your students highly engaged and give them great practice with the technique of substitution. After students evaluate the definite integral, they must search for their answer and this problem becomes the next definite integral for them to work. Includes trig, log, and exponential functions. There is one inverse tangent integrand 1/(1+x^2) which does not require u-substitution, but I always include these when I teach u-sub since students confuse that one.
My students love this format! They do not get up when the bell rings! "If all of our homework were like this, I would do it all!"
Can easily be made into a scavenger hunt or task cards. Can be used as guided notes, independent practice, you name it. I do not include answer keys with my circuits since the answers are part of the circuit. All the teacher needs to do is work the circuit ahead of the students to see how the idea unfolds.
My colleagues and I thoroughly check the circuits, but if you ever find a mistake, please let me know!