Science is an experimental subject and its learning is of more value to pupils when they are involved in all aspects of the process of scientific investigation - identifying the problems, collecting information, analysing experimental results or observations, and drawing conclusions. For effective learning, pupils should carry out investigations independently or in small groups where each person involved has a good share of the responsibility in what is being done. For this reason, in many member countries an increasing number of science education programmes are currently being devised on the assumption that school science classrooms or laboratories will contain plentiful supplies of suitable equipment and materials for the pupils.