The Graide Network connects K-12 teachers with remote, on-demand teaching assistants to grade and provide thorough feedback on student work online. "Graiders" are highly qualified, vetted undergraduate and graduate students from colleges across the country who are aspiring teachers. We discuss the importance of effective feedback and how teachers are using The Graide Network as a powerful instructional tool. We also discuss best practices for feedback and what effective feedback really looks like. And finally, with the increased focus on enhancing teacher preparation programs, we explore the value of experiential learning for pre-service teachers and virtual fieldwork opportunities.