Whis software is best for AR/VR/MR ?

There are several 3D software options that are well-suited for use in the AR/VR/MR industries, particularly for educational purposes. Some popular options include:

Unity: Unity is a widely-used game engine that is also well-suited for creating AR/VR experiences. It has a large community and a wide range of tools and assets that can be used to create interactive and immersive experiences.

Unreal Engine: Unreal Engine is another popular game engine that is well-suited for creating AR/VR experiences. It has a powerful renderer and a wide range of tools and assets that can be used to create high-quality experiences.

moreover SketchUp, Blender are also good
Ultimately, the best 3D software for AR/VR/MR and educational purposes will depend on your specific needs and the type of experience you want to create.

You could be more specific here. Do you need 3d soft for
VR/AR content creation? as ozey6 mentioned here you would go with blender, 3dmax, maya, cinema4d ..and so on.
VR/AR content creation in VR? then u d go with gravity sketch, adobe medium ... and so on.
VR/Ar final presentation? all major game engines again as stated above unity / unreal4 / etc.
Or you plan to learn more lo level stuff? then i guess open gl and so on.