This tutorial will show you how to push out an online assignment to an intervention group as opposed to the entire class roster.
When you sign in, you'll be defaulted to your assignment data page. From wherever you want to build your assignment, go ahead and click "Assign."
Once you're on your assignment settings page, scroll all the way down to the bottom of the page and deselect any of your sections.
Then move to the right where it says "Filter Interventions" and use the drop-down menu to select the intervention group or groups that you would like to push the assignment out to.
Click "Add All," then select "Create Assignment."