Play is central to children’s learning and development in the early years, including the learning of mathematics. The aim of the present study was to explore how play skills are related to mathematical skills in toddlers by examining the correlations between different kinds of play skills and mathematical skills, and how level of play skills is related to mathematical skills. The participants were 1088 toddlers in Norwegian Early Childhood and Care institutions who were observed by the staff in 3-month periods beginning when they were 2½ years old. The skills in mathematics and play were assessed by structured observation. The overall scores for play skills and the scores for all types of play skills correlated significantly with the scores for all mathematical areas and the total score for mathematics. The skills Interaction in Play and Independence in Play displayed the strongest correlations with mathematical skills. Rule-based Play was difficult for the toddlers, whereas Pretend Play and Exploring and Construction Play correlated with mathematical skills and may be types of play that are more suitable when introducing mathematics in toddler groups. When the group of toddlers was divided into three subgroups according to their level of play skills, the level of play skills was strongly related to the level of mathematical skills. Toddlers with weak, middle or strong play skills also exhibited corresponding low, medium or high levels of mathematics skills, which emphasises the importance of understanding the relations between play and mathematical learning when working with toddlers.

A body of studies, which are mostly based on parental reports, have documented gender differences in early language proficiency, and girls tend to outperform boys in both language production and language comprehension. In this study, staff in Norwegian Early Childhood Education and Care institutions observed language comprehension, word production, and participation in adult-driven language activities in 1005 thirty-three-month-olds (489 girls and 516 boys). Significant gender differences in favor of girls were found in all aspects explored. Children with high language scores participate more in language activities than children with low language scores, and boys are overrepresented in the last-mentioned group.

This study examines possible relations between early mathematical skills and motor life skills in 450 toddlers aged two years and nine months. The study employs baseline data from the longitudinal Stavanger Project – The Learning Child. The children's mathematical skills and motor life skills were assessed by structured observation in the natural environments of kindergartens; authentic assessment. Two staff members independently observed each child during play and daily life activities over a period of three months. Consistent with recent studies of older children, the results revealed a significant relation between motor skills and mathematical skills. Children with weak, middle and strong motor life skills also exhibited low, medium or high levels of skills in mathematics. The differences between the groups yielded a moderate to large effect size (Cohen's d). The groups differ also for each of the six sections in the observation instrument (Counting and series of numbers, Enumeration, Shape and space, Pattern and order, Mathematical language, and Logical reasoning).

The aim of the present study was to investigate the performance in arithmetic related to achievement levels in reading and mathematics. Basic arithmetical facts and multi‐step calculations were examined. The participants were 941 pupils aged 8 (N = 415), 10 (N = 274) and 13 (N = 252) years. The pupils were divided into four groups by standardized achievement tests. One group showed low achievement in both mathematics and reading (MLRL), a second group showed low achievement in mathematics only (ML‐only), a third group in reading only (RL‐only) and a fourth group showed normal achievement in both mathematics and reading (NA). The ML‐only and the MLRL groups did not differ significantly in basic arithmetical facts at any age level, but both groups performed below the RL‐only and NA groups. The two latter groups also performed similarly at all year levels. In multi‐step calculation all groups differed significantly at the lowest age level, with the NA as the group with the best achievement, followed by RL‐only, ML‐only and the MLRL group. At the two highest age levels the relations between the groups, in multi‐step calculation, were in accordance with the results regarding basic facts. The findings indicate, for both normal and low general mathematical ability, that low achievement in reading to a small extent interferes with the pupils’ development of arithmetic performance

This retrospective study, undertaken in Norway, examines how reading skills level in 851 fifth graders are related to how the children used their language skills in play and everyday activities as toddlers. Data were collected with the Norwegian National Reading Test and through structured observations by staff in Early Childhood Education institutions using the TRAS (Early Registration of Language Skills) instrument. Children with low reading skills had lower language skills than the group with high reading skills for both TRAS total and the different TRAS sections; effect sizes varied from small to moderate. The group with moderate reading skills had better results for TRAS total than the group with low reading skills but weaker results than the group with high reading skills. In the TRAS sections, whether the moderate skills group differed from the other groups varied. The results imply the need for early intervention to start at toddler age.