For students having trouble logging into raz-kids or IXL, try deleting browser cache.
http://www.wikihow.com/Clear-Your-Browser's-Cache
https://www.namecheap.com/support/knowledgebase/article.aspx/9209/0/windows
http://www.wikihow.com/Clear-Your-Browser's-Cache
https://www.namecheap.com/support/knowledgebase/article.aspx/9209/0/windows