There is an Import option for Contact Attributes (Click Profile Name > Import Data). Upload is via CSV, the file must contain the unique Parent Contact in the first column, and any number of additional columns for the Contact Attributes. Note that the Contact Attributes must be created in EdSmart before they can be mapped to the fields in the CSV.
After upload, the columns can be mapped to Attributes.
Click 'Next' and you will receive an email as soon as the import is completed.