Remember those first days of school when our teachers would ask us to write about what we did over summer vacation? Remember the pictures we'd draw and the adventures we'd write about? Did anyone ever ask their teachers what they did over their summer vacations?  I finally got that chance and interviewed Rebecca Kramer, one of our Ross Valley School District teachers, who spent her summer vacation traveling through South America, exploring Bolivia and Peru with lifelong friends. Kramer can now check off two of her "Must Do" experiences: hiking the Inca Trail and exploring Machu Picchu. And …