Teacher training has entered the collaborative phase as faculty members from different universities worldwide have been sharing their teaching practices using the available educational technologies. This has made curriculum development more exciting and the ideas more diverse since other cultures may have different approaches to tackling subjects taken up in the curriculum. This study used a qualitative case study approach since it wanted to show a broader picture of the learning experiences; mainly, this study included ten professors and students from three universities and used collaborative teaching to show how a project can be achieved by different parties collaborating. This study investigated the online educational courses that have capitalized on the available educational technologies to show diversity in their curriculum. The researcher also conducted class observations where the students explored collaborative teaching methods across different cultures and compared their similarities and differences. The study also assessed how educational technology has helped achieve diversity in curriculum development as professors from different universities worldwide. Findings indicate a necessity for including additional training diversity in the best pedagogical approaches to facilitate cross-cultural collaborative experiences in both curriculums and online education environments.