The paper describes concepts and the realisation of vision teachlets for an interactive visualisation of algorithms in the field of photogrammetry and image analysis. A series of web-based teachlets is being developed, which allow students to learn photogrammetric techniques without any temporal and spatial limitations. The teachlets are meant as an addendum to a lecture series, not as a stand-alone learning tool. Currently there are four vision teachlets accessible on the E-Learning webpage of the Chair of Photogrammetry at TU Dresden, which will be further extended: Cross correlation for finding homologous points in pairs of images Least squares matching of homologous points Space resection Morphological operations The teachlets are developed platform independent in Adobe Flash and Java. The paper presents the features, the technique and the usage of these vision teachlets and will give an outline on our future activities in the field of E-Learning. 1.