The research is clear: Failing to fill summer months with meaningful mental stimulation can cause students to suffer stagnation at best and regression at worst. The same is true for adult learners. If teachers fail to fill their summer months with challenging mental exercise, they, too, will return to school less able to function at their highest levels at the time their students need them at their best. Professional learning leaders have a charge to advocate for and design high-quality summer learning options for the educators they serve. There are lots of interesting ways educators can continue learning over the summer. See the box at right for a list of ideas. Educators can challenge themselves and their colleagues to try at least one of these