Nadisha Hunter, Staff ReporterThere has been a slight increase in the number of students attaining mastery in the 2012 sitting of the Grade Four Literacy Test.The results, which will be made public sometime next week, show a three percentage point increase.There is 74 per cent mastery level this year compare with a 71 per cent last year and 67 per cent in 2010.Despite the marginal improvement in the result of the literacy test, Education Minister Ronald Thwaites is raising concern about the reported cohort of the students who sat the examination who are said to have special needs.Thwaites told our news centre that 15 per cent of the students who took the grade four literacy test are challenged and would not be able to meet the required standards.Thwaites said the education ministry would be seeking to verify the figures so the necessary assistance could be given to the students who are in need.Meanwhile, Thwaites said the improvement indicates that the country is on a path to achieving the education goal of having full literacy by 2015.Almost 60,000 students sat the Grade Four Literacy Test this year.