Many years ago I learnt the Japanese greeting おはよう先生 Ohayō sensei – “Good morning Teacher”, from a pupil who joined my class speaking very little English. Now was my turn to say “Ohayō sensei” to the visiting group of Japanese teachers who would lead this CLR (Collaborative Lesson Research) day in London. With the assistance of Associate Professor Dr Taro Fujita from Exeter University who translated, we were provided with a superb insight into the Japanese approaches to curriculum design and pedagogy in the teaching of mathematics Grade 1 – 6 (Yrs 2 – 7 in the UK).
Throughout the day, the importance and influence of ongoing academic and school based research was apparent. The Japanese curriculum has a ‘10 year life cycle’ with changes considered and developed by a series of experts over time with a focus on establishing excellence, equity and feasibility. The involvement of academics and school based lesson study is clearly integral to how changes are considered before implementation – securing the evidence for when change is needed!

Four areas of mathematics are identified in the Japanese curriculum – Number & Calculation, Shape, Measurement/Change & Relationship and Data Utilisation. The government provide their approved text books for every child to keep, the content of which is trusted by the teachers and used to plan the daily 45 minute mathematics lessons. There is a notable absence of a deck of PPT slides provided, teachers craft their lessons based on the text book and reflect on their effectiveness in the classroom through the lesson study approach. The text book may not be used in the lesson but is available for children to use outside of the lesson. Also of note is each child is provided with their individual box of ‘resources’, manipulatives needed for the lessons.

The curriculum focus of the day was ‘Developing Algebraic ways of Thinking in Elementary Schools’. Children thinking is a critical feature of the Japanese lessons, and generally the allocation of time given to develop and secure specific concepts is more than in the UK. Algebraic Thinking is deeply embedded in the realms of ‘Number & Calculation’ and ‘Change & Relationships’, with Relational Thinking, Pattern Spotting and Generalisation secured before formal algebra is introduced in Junior High school (Secondary phase in UK).

With so many ideas to be drawn from the day I have chosen just two to illustrate key points that took my attention.
The Tape Diagram
My first example of continuity and coherence in the Japanese curriculum is the development of the ‘Tape Diagram’.
In 1st Grade children approach composing/decomposing numbers through practical tasks and storytelling, representing the situation with blocks (cubes), pictures and developing a mathematical sentence/expression to describe the relationship and subsequently using to finding an unknown value.



In Grade 2 the linearity of these representations continues with the evolution of the Tape Diagram. Semi–Concrete framing, where the picture is in a rectangular frame to group items as a continuous quantity, leading to removing the pictures to create an Abstract Representation – the Tape Diagram. The Tape Diagram is the model children use for visualising the part- whole relationship and subsequently working with the inter-relationship of addition/subtraction and multiple expressions representing the same relationship.


Notice the specified thinking – two expressions each with a distinct purpose.
Mathematics expression to find the children left 15 + 🔲 = 34
Mathematics expression to find the answer 34 – 15 = 19
This coherence in the Japanese ‘linearity’ model naturally leads to the introduction of the numberline (kazu no sen 数の線), potentially reducing the cognitive load. The number line is used as a tool for showing the relationship between numbers rather than for answer finding.

The Japanese approach is a subtle but important difference, improvement in my opinion, to the UK’s NCETM Part-Part-Whole model, introduced at Y1, referred to as the ‘cherry model’ which is non-linear. Teachers in the UK use the ‘cherry model’ in different orientations and this representation does not have that natural flow, offered by the Japanese approach, to the numberline. Additionally, the naming of the whole and parts in the Tape Diagram can be developed to preserve the proportionality of the story and in the use of inequalities, which is not evident in the ‘cherry model’.
In Grade 3 the emphasis on Relational Thinking maintains the link with the numberline when Japanese children meet the preservation of relationships in transformed expressions shown in this Grade 3 (Y4 in UK) task/problem:

Example of how the problem developed can be seen in these ‘Bansho’ – board writing, the outcome of the children’s ideas and solutions.
N.B. Physical manipulative & writing on board


- Again note the distinct expressions – to represent the relationship and to find an answer.
- The Highlighted text – indicates where children are resistant to the transformation but visually supported through the physical moving of the postcards.

Habits of Mind – Mathematical Behaviours
My second example relates to my long held belief in the importance of children developing mathematical Habits of Mind (Cuoco et al 1996). Today’s evidence of the Japanese curriculum reinforced to me how these behaviours are encouraged through the embedded expectation for all children to think, reason and explain at all stages of their work.

This example from the day, starts with a context which is most likely not familiar to those in the UK.
The Amida lottery, or Amidakuji (阿弥陀籤), is a traditional Japanese ladder-climbing game used to randomly pair items. It consists of vertical lines with horizontal “legs” connecting adjacent lines. Participants choose a top starting point and follow the path down, crossing horizontal lines (turning sideways) to reach a resulting end point.
N.B. You must turn sideways when you come to a horizontal line. E.g. The mouse would get to the treasure.

This Grade 4 (Y5 in the UK) ‘Amida Lottery’ problem solving task, gives children the opportunity to use and demonstrate mathematical behaviours, learn from collaboration with their peers, identify the mathematical structure and for the algebraic thinking to be developed:

With the learning outcome illustrated below.



Children collaborate and develop their Relational Thinking, Pattern Seeking and Generalisation through
- Strategising – start with a more manageable number of animals
- Exploring – try different arrangements and reflect on the representation
- Noticing and describing – articulating observations and ideas, pattern spotting
- Recording – sharing their ‘if and when’ observations to build a cohesive response to the task
- Conjecturing – following their ‘I think’ statements to a general case
(As well as drawing the connection to triangular numbers, which everyone on the day noted with a loud “ooh nice triangular numbers”).
These elements are recognised in the Japanese curriculum as being integral to the algebraic thinking being developed and appropriate time is allocated for this to be achieved. With the current focus in the UK following the Curriculum and Assessment Review on offering a richer curriculum with problem solving at its heart, there is much to be considered from the Japanese curriculum. In my opinion the pedagogy of ‘Problem solving’ should be included in the recommendations/changes. Time allocation and classroom organisation will help, but for all children to have the opportunity to use their prior knowledge in a problem solving situation, develop critical analysis and and in the process develop their mathematical thinking a fundamental change may be needed.
Other take aways from the day:
- All teachers are ‘singing from the same page’, be it with their own ‘tone’ of voice.
- Equity and Oracy are at the forefront of planning in their mixed-attainment (heterogeneous) groups. With lesson study considering not only what the teacher says and models but how the children respond.
- Collective learning is encouraged where children discuss and solve problems together at the desk and on the board.
- The high level of subject knowledge of all teachers was distinct.
A couple of surprises:
- Children are responsible for their classroom being kept clean
- Lunch is a learning experience – ‘Food Education’, is not ‘grab and go’. All children eat the same supplied food (subject to allergies) which is nutritionally balanced, for all children to learn about the importance of healthy balanced diet and to communicate with all their peers – seating groups for lunch are planned by the teacher and changed weekly.






































