\How can we ensure teachers and students have positive experiences in online international classrooms? Here, Nelly Ramírez Vásquez and Mariana Estefanía Elizondo García share some tips. First and foremost, clarify the theme and focus of the course with your teacher collaborator/s. Then, decide on the duration of the collaboration and identify the characteristics of your prospective students, including their ages, academic backgrounds and language proficiency. Another aspect to consider is that there may be time differences between the universities involved. In this case, you could use tools such as YouCanBookMe or Calendly to streamline the coordination process. The ratio of students from each university also plays a crucial role in an online classroom. We recommend at least one to three to ensure a meaningful experience.