Save the activity you are making and just skip "add standards" and "add resources".  Go to Home > Standards > List of Standards.  You can "Add a Standard", "Browse Standard", or "Import a Standard".  Once you already made a selection, double check and make sure that the Standard you wanted to use is "enabled".

Check the status of the Standard you wanted to use in your activity. 

Go back to Home > Activity > List of Activities and edit the activity you saved earlier.  Scroll down until you see the "standards" link. 

Check if the standard you added/enabled is now on the list.  Click on the checkbox to make a selection (single and multiple) then click "Add Standard to Activity" action button.

And that's it!  Your activity is all set!

GradeMaster Technical Support