On May 06, 2020(Taiwan Standard Time), Li-Fen Chen, the Editor of Mandarin course materials for Kang Hsuan Educational Publishing Group in Taipei, gave an online presentation about Mixed-Age Class Teaching Design on "Huayuworld.org" to share with all Chinese language teachers in the world on how to teach mixed-age students by using "Let's Learn Chinese," the Chinese teaching material published by the OCAC.
Link:
https://reurl.cc/yZ64bl
Li-Fen Chen demonstrated how to teach Chinese to mixed-age students