Wellcome on the mathematical pages of

Rolf Fraedrich

academically qualified educationalist * teacher

 

On these pages You will find a few informations about mathematics (as much as possible )

The abacus - the world´s oldest calculator
(sorry, not available in English, but you may find some English links)

Informations about the abacus (in German).

 

 

Geometrical steel-models for school
(sorry, not really available in English, but you will find some ideas)

a few steelmodels

Sorry, the descriptions of the other mathematical subjects are
only to be read in German language.