Click on the Group that you wish to copy. (We will use Kindergarten ELA for this example)

Doing so willl open the Standard Group Editor window seen below.

Click the drop down arrow on the Save button, which will display various save options. Click Save & Copy 

Doing so will bring up the window shown below. You'll be asked if you want to copy the children as well, or continue copying just the group. Click Only Copy Group.

This will bring up the Standard Group Editor window for the copied group. 

Note: The Group Name field is populated with the original group title, as well as the word Copy. 

From here you can edit the Group information , and add new Child Standards and/or Child Groups.

Once done, click Save. A notification will appear stating the group copied successfully, and the group will now appear in the Standards Bank.