Telementoring for K-12 students is done primarily outside of school, typically addressing topics that are extrinsic to school curricula. As beneficial as extracurricular telementoring can be, bringing mentors virtually into classrooms to interact with students and teachers over time holds great potential—and considerable challenge—for both. How can telementoring be integrated effectively into content-based curricula taught in face-to-face educational contexts like classrooms? What is key to the success of this type of curriculum-based telementoring? Answers to these questions appear below, illustrated by examples from an informal taxonomy of curriculum-based telementoring projects that were facilitated by the Electronic Emissary (http://Emissary.wm.edu/), the longest-running formal telementoring program for K-12 students and their teachers.