If you create pages for The Beacon (Students and Teachers) then you may have used Wallwisher before. Recently wallwisher has not been very stable. Sometimes your walls don't appear at all. You might want to try using corkboard.me
As soon as you visit the site your wall is created. Just copy the URL (web address) and then use 'Quick Embed', paste the URL in the 'Embed a web page' option to put it into your page.