Individualization of instruction in a regular classroom is difficult. The paper explores the possibilities of using a mobile touch device and a web tool for time individualization in mathematics instruction. The paper compares the pros and cons of using an electronic and a regular (printed) test to determine students' needs. The results show that the electronic test is more time-saving than the regular test. Moreover, the paper also describes the use of an electronic test in a classroom. [For the complete proceedings, see ED590271.]