The use of social media in language education is evident in the plethora of online content generated by education organizations. Teachers and learners alike have used platforms such as Facebook, YouTube, and Instagram to access and disseminate learning content in the forms of text, images, podcasts, and videos. However, despite the prevalence of social media in the language-learning sector, its pedagogical use has been limited to learning language features. This chapter analyzes the potential use of an ecosystem of social media platforms to augment varied modes of TESOL instruction, namely live, online, and hybrid, through a critical lens in higher and adult education. The integration of critical content and critical thinking development in social media platforms, in which authentic content is directly consumed, co-created, and disseminated, enables TESOL teachers to help learners become aware of how power shapes information, how to resist coercion, and challenge the status quo.