When you select the address attachment and type in an address, Google will look for the address in Maps and add a map to your eduAPP displaying the location.
If you add an address and the map doesn't show, it may be because Google doesn't recognise the address. Visit Google Maps and start typing the address. It should be presented to you as an option - go back into Reach and add the address exactly as it's written in Google Maps.
If you follow this process and your map still doesn't show, contact Digistorm Support on firstname.lastname@example.org.