ENOne of the major initiatives in developing Information Society in Lithuania is the introduction of e-journal system in schools. E-journal is perceived as a central piece linking educational and social processes, activities and tasks of teachers, pupils, parents, and others. The tool is being marketed as the key enabler of organizational efficiency boost. However, ministerial survey reveals the existence of both positive and negative effects stemming from the introduction of e-journal in schools, thus suggesting that the decision to adopt electronic journal in each case must be carefully assessed. Surprisingly, to date there are no studies of e-journal uses in schools conducted in Lithuania. In this work we adopt a theoretical model of IT-induced personal performance in order to analyze how e-journal system affects the work of teachers and class principals (teachers). The adopted model distinguishes four dimensions in the IT-induced performance gains: productivity, efficiency, quality, and consistency. Our study helps better understand the pros and cons of schools’ computerization, provides an example of how changes in performance can be assessed in knowledge organizations, suggests areas for improvement in pursuing further computerization of schools in Lithuania.