LosOjos and VikPaw - so many thanks for your assistance, and your continued responses. We've just moved to SIMS and the use of this site will become invaluable, I guess.
The { IF statement } works and thanks for the advice: I'm going to put a few points here that I found issues and then anyone reading at a later point will be able to do check boxes based on a value entered.
1. You must have "View Field Codes" set so that you can enter the formula/function - press Alt-F9 for this, or insert from the AllCommands
2. The formula to use is {IF {=SUM(ABOVE) } = 1 "TICK" "" }
3. Make sure you use Insert FORMULA into the Table as it gives the correct curly brackets (otherwise they're see as text and not a function}
4. When Run from SIMS, do as a Word Export and then for each report generated then you'll need to do Ctrl-A (Select All) and then Update All Fields.
That seemed like a lot of work for the 1500 pupils we have (1500+ File Opens and then Update All). So:
Because ALL Macros are Enabled I have added a Macro which Updates the Codes automatically - avoiding 1500+ repetitions by me.
This Macro also allows the PDF Export to be done and having the tick in the right place.
The AutoOpen Macro is this, Go to View - Macros and Create a New Macro (I called mine AutoOpen). Don't delete any of the ones which appear there.
Sub AutoOpen()
' AutoOpen Macro ' Macro created date by G Lewis to Update Fields on Open '
Dim aStory As Range
Dim aField As Field
For Each aStory In ActiveDocument.StoryRanges
For Each aField In aStory.Fields
aField.Update
Next aField
Next aStory
End Sub
Once again thanks to 2 people for helping along the way - I will endeavour to assist others in the future.