Creating an assignment with multiple standards is a feature available with a premium license.
To create an assignment with multiple standards, begin by creating a custom assignment using the Create an Assignment feature.
Once you are on the assignment builder screen, add games and assessments from the selected standard.
Use the filters to select math/science and elementary/middle.
From there, use the drop down to select a new standard.
A new set of games will appear after you select a new standard. The assessments will update to reflect the new standard chosen. These games and assessments can now be added to the assignment.
Once you customize your assignment, assign it for students to play!