Textbooks play an important part in teaching and learning mathematics. However, textbook research on spatial ability has so far received little attention. In this study, we investigated whether school mathematics textbooks provide enough opportunities for primary students to learn three-dimensional shapes and help them acquire spatial ability. Three mathematics textbook series used in Hong Kong were analysed through content analysis. Findings showed each series of textbooks contained five domains for introducing solid figures, which included real-life examples, understanding concepts, measurement, finding laws, and developing spatial ability. The development of spatial abilities was mainly shown in the production of three-dimensional graphics. What students experienced in the learning of 3-D shapes was relatively narrow. Geometric graphics were mainly limited to the conventional shapes at the early stage. Activities to explore three-dimensional graphics were insufficient. It was suggested that combining the surrounding world of children with geometry in the classroom was not just a criterion for textbooks but also the focus of classroom teaching. The flexibility of teachers’ adoptions of textbooks is also worthy of further investigation. Copyright © 2021 by the authors; licensee Modestum.

Teachers sometimes limit the opportunities for students to learn because they perceive that their students have limited ability or potential for learning. In this paper, through a case study, we show how teachers taking part in a learning study learnt to cater for students’ individual differences and at the same time, opened up opportunities for students to reach their potential. The learning study took place in special school settings in Hong Kong. Instead of following their former practice which was considered to be tailoring the curriculum to the students’ perceived ability, the group of teachers tried to find a powerful object of learning, such that further learning can be built, leading to a level of learning that they had never dared to try to reach before. The outcome was encouraging and had great impact on the teachers involved.