The main objective of the Intergeo Project (http://i2geo.net) is to make digital content for mathematics teaching in Europe more accessible, usable and exploitable. So far, Intergeo provides an Internet platform that offers content in a searchable and metadata-tagged form. In particular, teachers can search for suitable content based on the key concepts and themes of their curriculum. Once found, the content can be used either directly on the web or using the software of choice. Another very important aspect is that all material used in the classroom should adhere to certain pedagogical and mathematical quality standards. Intergeo facilitates the evaluation of material by means of a quality-testing framework that aids teachers and researche...