In "Material for all" you can find a visual mathematics dictionary, mathematical posters, riddles, and further free didactics material. See also the popularization articles in "Recreational maths and didactics".
Contact
ADDRESS: University of Luxembourg, Department of Mathematics
6, avenue de la Fonte L-4364 Esch-sur-Alzette, Luxembourg
OFFICE: Maison du Nombre (MNO) Campus Belval, 6th floor, room 06.15.120
(on the right, almost at the end of the long L-shaped corridor)