Stewart Saathoff was telling us:
Stewart Saathoff nous racontait que :

Printing two sided is not a Word issue, but a printer one. If your printer
handles that, than it is fairly trivial to set it up.

Design a 2-page template sized to your card size. Place the merge fields you
want on each page (Name info on the 1st page and course info on the 2nd
page). Merge to a new document and print the result on the printer that
handles duplex printing.

Aside from the two sided printing issue, Word does not really have the
ability to perform a "multiple items per condition (=key field)" or in your
case "multiple courses per student" mailmerge.  See the "Multiple items per
condition" item under the "Special merges" section of fellow MVP Cindy
Meister's website at
http://homepage.swissonline.ch/cindymeister/MergFram.htm

Or, if you create a Catalog (on in Word XP and later, it's called Directory)
type mailmerge main document with the mergefields in the cells of a one row
table in the mailmerge main document with the keyfield in the first cell in
the row and then execute that merge to a new document and then run the
following macro, it will create separate tables with the records for each
key field in them.  With a bit of further development, you may be able to
get it to do what you want.

' Macro to create multiple items per condition in separate tables from a
directory type mailmerge

Dim source As Document, target As Document, scat As Range, tcat As Range
Dim data As Range, stab As Table, ttab As Table
Dim i As Long, j As Long, k As Long, n As Long
Set source = ActiveDocument
Set target = Documents.Add
Set stab = source.Tables(1)
k = stab.Columns.Count
Set ttab = target.Tables.Add(Range:=Selection.Range, numrows:=1,
numcolumns:=k - 1)
Set scat = stab.Cell(1, 1).Range
scat.End = scat.End - 1
ttab.Cell(1, 1).Range = scat
j = ttab.Rows.Count
For i = 1 To stab.Rows.Count
   Set tcat = ttab.Cell(j, 1).Range
   tcat.End = tcat.End - 1
   Set scat = stab.Cell(i, 1).Range
   scat.End = scat.End - 1
   If scat <> tcat Then
       ttab.Rows.Add
       j = ttab.Rows.Count
       ttab.Cell(j, 1).Range = scat
       ttab.Cell(j, 1).Range.Paragraphs(1).PageBreakBefore = True
       ttab.Rows.Add
       ttab.Cell(j + 1, 1).Range.Paragraphs(1).PageBreakBefore = False
       For n = 2 To k
           Set data = stab.Cell(i, n).Range
           data.End = data.End - 1
           ttab.Cell(ttab.Rows.Count, n - 1).Range = data
       Next n
   Else
       ttab.Rows.Add
       For n = 2 To k
           Set data = stab.Cell(i, n).Range
           data.End = data.End - 1
           ttab.Cell(ttab.Rows.Count, n - 1).Range = data
       Next n
   End If
Next i