Private tutoring is not always effective in raising academic achievement; and in some schools students commonly skip classes or sleep through lessons because they are tired after excessive external study. This means that the shadow system can make regular schooling less efficient.
Teachers who spend more time focusing on private lessons than regular classes can cause greater inefficiencies in the mainstream school system. Situations in which teachers provide extra private lessons for pupils for whom they are already responsible in the public system can lead to corruption.
Knowledge of subject matter
Ability to effectively communicate subject matter
Application of different learning strategies including active learning and peer-to-peer techniques
Ability to listen and answer questions during tutoring sessions
Set goals and/or expectations during the first few sessions
When private tutoring is provided by well trained tutor however the effects can be dramatic, with pupils improving performance by two standard deviations. The system of excessive private tutoring will take time for activities such as playing soccer or joining clubs from students.