How do I export my Minecraft build to Paint 3D?
If you want to export your Minecraft Education Edition build to Paint 3D (or another 3D editor), start by getting a structure block. To do this, open your inventory and search for "structure block".
Place the structure block down near your build. Be careful not to place it inside your build, or you will export the structure block into the 3D model as well!
Right click the structure block, and adjust the size & offset fields until your entire build is shown in the preview.
Click on "Export", and then find a spot to save your 3D model file. You can then open this file in Paint 3D (or any editor of your choice) to do as you please.