We found both formats to be successful in helping to build energy literacy and to effectively address complex environmental challenges. Each approach had some benefits and tradeoffs in comparison to the other, and in comparison to the principles derived from the literature. We would recommend that with either approach efforts are made to connect the content more explicitly to what is happening in participants' own communities, and that more space is provided to consider the individual goals and values of participants. In spite of these limitations, we found both approaches to be valuable for learning and for advancing energy literacy in teachers and in their ability to bring energy literacy to their students.