Head of Mathematics Mastery Primary

The Head of Subject Mathematics (Primary) provides authoritative educational leadership for their programme, under the pan-programme leadership of the AC+ Education Director. The Head of Subject for Mathematics Primary is responsible for the programme’s educational quality and impact across Ark schools and the wider partnership and shares responsibility with Ark Schools colleagues for improving subject outcomes across the network. They will work as an integrated part of an Ark subject leadership team to establish a shared vision for subject excellence that underpins how their programme is understood, implemented and developed, and will work across AC+ to ensure that this vision informs implementation support and the programme’s ongoing evolution.

They will contribute directly to Ark Schools’ work to improve subject outcomes across the network, including providing school support and undertaking an agreed allocation of work directed by the Ark Schools’ Director of Curriculum and Assessment. They will ensure that insights from this work inform the programme’s ongoing development, supporting a live and responsive partnership between Ark Schools and AC+. The Head of Subject (Mathematics Primary) will lead their subject within the Programmes team, keeping the team up to date with educational thinking and coordinating all ongoing programme maintenance, including high-quality assessment writing.

They are also hands-on, working alongside the design team on curriculum writing, pedagogical quality assurance and coaching of design team members. They will also build the programme’s external profile by sharing its curriculum and pedagogical thinking, contributing to national subject conversations and developing strong advocates for AC+ approaches.

The Head of Subject – Mathematics (Primary) will report into Programmes Director. This role is currently operating hybrid working in our West London Office on a permanent/fixed term/temp basis working full time/part time.

1st round interviews will be taking place virtually w/c 16th November 2026 with 2nd round interviews taking place in person on Monday 23rd November 2026. 

Key Responsibilities:

• Contribute to and implement the organisation’s strategy and mission, working closely with the Product Strategy Director, Education Director and Heads of Product to develop and implement a programme strategy that supports the organisation’s mission, strategic priorities and long-term sustainability
• Keep abreast of sector and subject developments, legislative changes, research findings and innovative practice relevant to their subject on a national and international level, working with the Expert Advisory Council to stay connected to the wider subject community
• Lead the strategic design and ongoing development of the Mathematics Mastery Primary curriculum, ensuring that it is ambitious, coherent, carefully sequenced, inclusive and responsive to developments in curriculum, assessment and the wider education landscape
• Ensure that inclusion-first principles are embedded across curriculum, assessment, professional development and implementation support, enabling all pupils, including those with SEND, lower prior attainment or English as an additional language, to access an ambitious mathematics curriculum
• Work closely with the Head of Subject for Mathematics Mastery Secondary to strengthen coherence, progression and shared educational approaches across the primary and secondary mathematics programmes
• Establish and facilitate regular Subject Panels, recording and sharing outcomes in line with agreed structures, and maintain a rigorous understanding of the implementation, impact and perceptions of their programme through subject panels, assessment outcomes, school visits, feedback, metrics, data points and other user feedback mechanisms
• Review and quality assure existing programme resources to identify strengths and priorities for improvement, building alignment with the Education Director and Ark subject leadership team around developments that will improve teaching, learning and pupil outcomes
• Provide school support across the Ark network, using AC+’s codified school-support model and adapting support in collaboration with Ark stakeholders to strengthen implementation and subject outcomes
• Lead the subject assessment strategy, including diagnostic, formative and summative assessment, and oversee the development and quality assurance of assessments, mark schemes, exemplification, standardisation and re-teach materials, ensuring that assessment evidence informs programme improvement
• Develop clear curriculum and pedagogical rationales and briefs, and train and support colleagues across the Programmes and Design teams, alongside external curriculum designers and authors, to produce consistently high-quality educational content
• Develop constructive relationships with education policymakers, researchers, professional bodies and funders where appropriate, contributing to national conversations about Mathematics curriculum, pedagogy and assessment through publications, events, partnerships and professional networks

Key Requirements:

• Right to work in the UK
• Educated to degree level, with substantial subject expertise in primary mathematics, demonstrated through relevant qualifications and/or professional experience
• Qualified Teacher Status or an equivalent teaching qualification
• Strong commitment to ongoing professional development and specialist qualifications, with a strong understanding of progression in mathematics across the primary-secondary transition
• A minimum of three years’ successful teaching experience in primary mathematics, including experience across both Key Stages 1 and 2
• Deep knowledge of primary mathematics curriculum design, sequencing, subject pedagogy, curriculum and assessment requirements
• Experience of leading curriculum development or improvement beyond an individual classroom, including designing or quality assuring mathematics assessments, mark schemes and standardisation materials
• Track record of providing professional development to teachers, including coaching, mentoring and training
• Knowledge of inclusive curriculum design and approaches supporting pupils with SEND, EAL and lower prior attainment
• Experience of using qualitative and quantitative evidence to identify priorities and evaluate impact, with strong editorial judgement and attention to accuracy
• Experience of leading complex, cross-functional projects, with the ability to manage competing priorities and reprioritise effectively
• Strong stakeholder management, negotiation and external partnership skills, with excellent written and verbal communication skills and the ability to communicate complex educational ideas clearly to different audiences
• An experienced and confident leader with a proven ability to lead and implement sustainable change
• Ability to probe, challenge and question appropriately and strive for continual improvement

• Our flexible working model offers the best of both worlds, balancing in person collaboration, either in our state of the art West London office or through visits to our schools, with the flexibility of remote working
• In addition to flexible working arrangements, employees can request to work fully remotely for up to 10 working days a year, whether this be in the UK or abroad
• Our flexitime policy allows you to work your hours around our core hours of 10.00 - 16.00, helping you prioritise your work-life balance and personal commitments
• 27 days annual leave plus bank holidays, rising with each year of service up to 30 days after 3-years’ service. This entitlement is pro rata for part time employees. This entitlement excludes bank holidays
• Full office closure between Christmas and New Year
• As an Ark employee, you will have the opportunity to be part of the TPT (The Pension Trust) scheme, our workplace pension scheme where we make an 11% contribution; you are not required to contribute towards this scheme unless you choose to
• Access to high-quality professional learning throughout your career, offering both face-to-face sessions and a bespoke online learning platform
• Access to Ark Rewards scheme offering savings from over 3,000 major retailers, interest-free loans available for season tickets or a bike, gym discounts offering up to 40% off your local gym and free eye tests

Ark Curriculum Plus is a not-for-profit education venture set up by the Ark Multi Academy Trust to improve subject outcomes. We’ve now been going for over ten years, using what we learn in Ark to support over 1,000 schools nationally. Our mission is to empower teachers to give every young person, regardless of their background, the subject knowledge and skills that will allow them to succeed.

We now have subject excellence programmes in English, Maths, Science and Geography, at primary and secondary. A team of subject experts work with partner schools to empower teachers to achieve subject excellence using an ambitious curriculum combined with CPD, teaching and assessment resources.

Our programmes, including Mathematics Mastery and English Mastery, have been shown to have measurable impact in evaluations by the EEF, FFT and The Brilliant Club.