The Actions menu on the Interactions page includes links to Kickboard tools for users. You can access the Actions menu by clicking the settings cog in the top right corner of the page and selecting Actions.
Currently, the Actions menu includes a link to Edit Group if you should need to change the students that are included in the displayed group. This will launch the edit group page in Classic and allow you to add or remove students from the group. You can learn more about editing groups here.