In this article we describe the use of Khan Academy to support the teaching of mathematics at high school. At Gymnázium Přípotoční in Prague 10, we regularly give pupils homework through Khan Academy and mark their work.
We describe the advantages and disadvantages of this approach in the context of current didactic knowledge. Finally, we present some of the practical experiences we have gained during the Khan Academy.
At the beginning of the article, we also review four other online tools that can support mathematics teaching, just like Khan Academy.