Hey if you’re looking for a Void World to use in Minecraft: Education Edition you can download one from here:

How to Import Minecraft Education Edition Void World into Minecraft:EE

1 – Download the Void World mcworld file and save on your computer

Download Void World for Minecraft Education Edition

2 – Open Minecraft: Education Edition and Click Play

3 – Click the Import button and browse your device, select the downloaded Void World, click OK

4 – Click View My Worlds to open the M:EE Void World in Minecraft Education Edition