Thanks a lot for this great solution. 

2015-11-12 18:14 GMT+00:00 Wolfgang Schuster <schuster.wolfgang@gmail.com>:
11. November 2015 um 19:01
Dear Sirs,

I'm trying to make a exam for my students. After the question I should provide a blank space for the answer. In the margin I want write the partial scores for the answer. The problem  occurs when I force a new page. In this case the text in the margin is flushed to the next page. I don't want this behavior. How can I can  this? 
Margin texts are flushed with the next paragraph but you can start one for the points only with the \dontleavehmode command.

\define[1]\Info
  {\dontleavehmode\margindata[inmargin]{\rotate{#1}}}

Another question: How can I anchor the scores in the middle of the vertical blank space?  This  \vskip4cm\Info{scores}\vskip4cm don't make the job.
You can use the \framed command to reserve the space for the answer and place with the score with a layer as background for the frame.

\setupmargindata[inmargin][style={\ss\tfx},location=outer,align=middle]
\setupmarginframed[inmargin][align=middle,location=outer]

\definelayer[infolayer][width=\framedwidth,height=\framedheight]

\startsetups[infolayer:place]
    \setlayer[infolayer][preset=middleright]{\rotate{\getvariable{infotext}{points}}}
\stopsetups

\defineframed[infobox][frame=off,width=max,background=infolayer,setups=infolayer:place]

\define[2]\Info
  {\par
   \setvariable{infotext}{points}{#2}%
   \infobox[height=#1]{}}

\starttext

\startitemize[n]
    \starthead{Question 1}
        \Info{9cm}{20 \periods[3] 15 \periods[3] 10}
    \stophead
    \starthead{Question 2}
        \Info{8cm}{20 \periods[3] 15 \periods[3] 10}
    \stophead
    \starthead{Question 3}
        \Info{6cm}{20 \periods[3] 15 \periods[3] 10}
    \stophead
\stopitemize

\stoptext

Wolfgang

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