In summary.
You have a text box now that "a value is passed and a running total" which has the score (?).
Create a text box ... say txtClass that has the Switch expression I showed above. This should ... update each time the score changes. If not, then you may need to put this in the AfterUpdate event of the Option Group ("True/Flase option buttons") :
Me.ReCalc
which will force a recalculation of all calculated controls on the form.
Finally ... in the Form Before Update ... as before ... you would put this:
Me![YourClassFieldNameInTheTable] = Me.txtClass
mx