Diminished Reality (DR) is a set of methodologies to hide, eliminate, and see objects in a real-time perceived environment, diminished reality. This technique is different from augmented reality (AR) and mixed reality, which place virtual objects in the real world to enhance reality. To enhance reality, virtual objects are placed between real objects or real objects are extended with virtual objects. Compared to AR, diminished reality aims to modify real-world scenes by detecting specific objects in a video stream and then removing them. Diminished reality is a technology that overlays a background image on a real object, making the object appear to be removed from real space. Unlike augmented reality (AR), which places virtual objects on real objects to make them appear to be removed from real space, diminished reality places a background image on a real object, making the object appear to be removed. In the coming days, diminished reality is expected to have various applications such as recreating a past or future scene by removing the current scene and removing obstacles such as walls and vehicle bodies to enable security verification from previously impossible perspectives. In light of all this information, this book chapter discusses the use of diminished reality (DR) applications, which stand out with their relevant new features, in education and provides examples of their use in various disciplines.