The purpose of this chapter is to familiarize readers with various forms of mixed reality environments that are used in different countries in the field of education including teaching and learning English. MiRTLE, The MARVEL Project, TIWE Linguistico, SMALLab, Virtual Touch Toolkit, SimSchool®, Second Life, and TLE TeachLivE™ are some of these technological advances that will be discussed in detail. Further explanation about the current and future use of TLE TeachLivE™ as well as other possible forms of mixed reality environments is also provided. The chapter concludes with current limitations of mixed reality environments and potential future research and applications.