The current use of two sets of units in the UK continues to be a source of muddle and confusion. Young people are taught metric (SI) units in school but, in the outside world, still have to contend with units such as inches, feet, pounds, stones and miles. Specialist teachers and practitioners of the sciences are not blameless. This paper…

Investigated young children's (N=20) comprehension of sentences containing one or more markers using three tasks in two experiments. Results suggested that children's comprehension of sentential number is aided by redundancy of information involving different syntactic markers, but not by mere repetition of the same maker. (JAC)