Well if you are using Off2Class and teaching within China with it, you would need to use a VPN. Also you can’t download the materials. These materials were designed for 1-1/ 1-3 classes. I have only used them in 1-1 situations. With ESL Library the materials are downloadable. Sometimes it works also without a VPN. The pronunciation lessons are …

https://www.reddit.com/r/TEFL/comments/dvqqtl/thoughts_on_paying_for_esl_lesson_plans/