Maths standards achieved by New Zealand children are sliding dramatically between their fourth and eighth years at school.
Too many of the older children are failing to grasp maths fundamentals such as fractions and decimals, according to a report issued by the Ministry of Education late yesterday.
The national study of about 4000 students found only 41 per cent of those at Year 8 - mostly aged 12 - met a Level 4 or higher standard of achievement in mathematics and statistics.
The study's report, by the Government's Council for the Ministry of Education, says the students are not achieving the success expected with fractions, decimals, percentages and pro-numerals (letters used to represent numbers in algebraic problems).
Yet about 81 per cent of Year 4 students (mainly 8-year-olds) met expectations within the curriculum's Level 2 band or higher.