Things to Remember About the Problem Format Preference
The default is Horizontal.
The Problem Format Preference affects what students see using
MathsFacts in a Flash RP (computer or tablet)
NEO 2s using the MathsFacts in a Flash RP SmartApplet
Renaissance Home Connect (computer or tablet)
The Problem Format Preference does not affect what students see using
NEO 2s using the MathsFacts in a Flash (offline) SmartApplet
Some levels use only Horizontal.
For a list of the levels, see Levels That Use Only Horizontal. These levels use only Horizontal (even if Vertical or Combination is selected as the problem format).
Once you have made a student an exception, that student will not be affected by the class setting for the preference, unless you remove the student from the exception list.