If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
Have you asked the school/college? They may have a list of previous work experience places. The other option is to browse the local directory. Get your daughter to send letters out to the ones that interest her.