Combining multiple sets
To Create a Combination Set:
To combine and merge multiple sets to study at once, click the “Combine” link on one of the specific set’s main page:

You will be directed to the “Combine Sets” page, where you can add more sets to your combination. Just click the plus sign next to each set you would like to combine. Note that you can only add sets that you have created or added to your favorites.

You can then choose how you would like to study with this combined set list from the pull down menu:

You can choose Learn, Test, Play Scatter, Play Space Race, Print term list or Print flash cards.
Just click the "Go" button to start studying your new combination set!
You can also choose to "Create a set" from the multiple sets you have selected. This will create a new set on your dashboard.
How do I delete a combination?
Right now, there isn't a way to delete a combination. We're working on it! But if you choose to "create set" instead of just combining them for a specific mode, you can delete it.