One website that I have found that has amazing lessons is 'Reading Like an Historian' through Stanford University (sheg.stanford.edu/rlh). Although, it does not focus specifically on East Asian history, the lessons provided for Japan and China are exemplary. The site is free to use and very student friendly. I am usually furusturated by convoluted lesson plans that I find on the web, but this site offers readings, graphic organizers and makes students think critically about historical questions. They continue to add more lessons but currently they have a focus on Chinese Immigration and Exclusion, Japanese Segregation in the Early 20th century in San Francisco schools, Japanese internment and the Invasion of Nanking. On this site they regularly provide materials that contain multiple perspectives and place the onus on the students to construct their own understanding of historical events.