Sigma is an Internet service that helps to test knowledge of students. The main feature of this system is possibility to combine work of specialists to create a distributed mode of high quality set of tests, questions and exercises for testing students’ knowledge level. Every specialist can offer questions to be included into the shared bank. Every teacher can make up his own set of tests using the collective data bank or using his own questions. After the test has been created, the only thing needed for students to start the testing is Internet access.
The main area of use is parallel computing, but Sigma can bу easily adapted for use in other subject areas.