The Sustainability of Digital Educational Resources

Among a large number of digital educational resources, high-quality resources are very scarce. For quite some time, the shortage of high-quality resources is the bottleneck problem of education informatization. In this paper, we will introduce an innovational feature of digital educational resources – sustainability, which includes interactivity, transparency, and openness. The transparency means that users can obtain the original creating process of educational resources by their contents. The openness means that users can conveniently edit the contents of educational resources. Sustainable educational resources will become better and better in quality through continuous optimization. The sustainable optimization of educational resources needs intelligent subject knowledge platform. We will demonstrate several cases of sustainable optimization based on Super Sketchpad (SSP) which is an excellent intelligent subject knowledge platform.