This engaging and self checking activity takes the students through 8 problems (each of the problems consists of one indefinite and three definite integrals) to be solved by u-substitution. It gives a variety of examples including trigonometric, exponential and logarithmic functions, square roots, and inverse trig functions. Students will work on integrals using the additive interval property to check their work and evaluate some of the definite integrals.Full solutions are provided.I hope this