I believe Mark is referring to this series of three classes: https://www.coursera.org/learn/basic-modeling https://www.coursera.org/learn/basic-modeling https

I believe Mark is referring to this series of three classes: https://www.coursera.org/learn/basic-modeling https://www.coursera.org/learn/basic-modeling https://www.coursera.org/learn/advanced-modeling https://www.coursera.org/learn/advanced-modeling https://www.coursera.org/learn/solving-algorithms-discrete-optimization https://www.coursera.org/learn/solving-algorithms-discrete-o... They are indeed excellent and highly enjoyable.