Check Box VBA Write A Value?

I have a checkbox that hides a range of columns when deselected and unhides the range when checked. I also want the code to write a value (1) to a cell when hidden and change the value to another value (0) when unhidden.

The range is hidden and unhidden perfectly, but the value "1" is written and doesn't change regardless of whether it is hidden/unhidden. (the value flicks momentarily to "0" when unchecking).

Code:
Private Sub cbTermPrev1_Click()
If cbTermPrev1.Value = True Then Range("Term_Prev1").EntireColumn.Hidden = False
Range("HiddenValPrev1").Value = 0
If cbTermPrev1.Value = False Then Range("Term_Prev1").EntireColumn.Hidden = True
Range("HiddenValPrev1").Value = 1
End Sub