Herbicide resistant weeds are a major problem in agronomic cropping systems worldwide. A common recommendation from university and industry weed scientists is to incorporate multiple herbicide modes of action to proactively manage herbicide resistant weeds (i.e. prevent or herbicide resistance from occurring). Recent research indicates the optimal way to prevent the increase in herbicide resistant weed biotypes is to tank-mix multiple herbicide modes of action, or at the very least utilize multiple modes of action within the same crop year. A classroom activity and lesson was developed to teach upper-division undergraduate and graduate students how to devlop a proctive herbicide resistance management plan, and the difficulty in implementing such a plan. Students were provided background information on herbicide resistant weed management, and the information was discussed in an online forum and class discussion. Subsequently, the students were requred to develop herbicide recommendations for 4 different crops that would provide effective proactive management of herbicide resistant weeds. After students developed their recommendations, barriers to adoption of their plans were discussed. Primary barriers that were identified included cost and crop rotation restrictions.