Using Software Center
Follow steps in Article 100004871 Install District Approved Software.
https://sccsd.freshdesk.com/a/solutions/articles/1000048711
After says installed wait 3-5 min then restart the computer. Log back into system.
Using MineCraft Education Edition Web site.
Open a web browser and go to
HTTPS://education.minecraft.net

Select Support Download

Select Windows Store Version link

Depending on Web Browser will see different message next to open App Installer.
Example for Chrome Select Open App Installer

Example for Firefox Highlight App Installer then Open Link

Select Install

Windows Store

Windows Store search redirects to Education.Minecraft.net