We are an organisation currently run totally by volunteers in a variety of roles.

In-school volunteers

Our first in-school volunteers are from a wide variety of backgrounds, but all share an enthusiasm to help children gain skills and confidence in maths.

For more details, please visit our In-school volunteers page.


Supporting our in-school volunteers, we currently have five mentors, all with extensive teaching experience in primary schools and most with specialist skills in teaching maths.

For more details, please visit our Mentors page.

Community organisers

In each geographical area where we operate, we have – or will have – a community organiser who manages the recruitment of in-school volunteers and their placement with local schools. For more details, please visit our Community organisers  page.


Bernard Manson is our chair and co-founder.

He has a postgraduate maths degree and both of his sisters are maths teachers. Maths education – and where it goes wrong – has been an interest for many years. Following a career in banking, he is now taking the opportunity to contribute to maths learning in schools.

Lisa Baglin is the Managing Director of Cass Art, a leading UK independent retailer of art supplies. She has worked in retail for nearly twenty years and is a qualified Chartered Accountant with a degree in Modern History from Oxford University. She has two children (age 10 and 14) and believes passionately that the early primary school years are key to laying the foundations for enjoying and understanding maths.

Ron Finlay is a communications consultant who is passionate about making the complex simple. With a degree in Economics from Cambridge University, he has always been as enchanted by the beauty of mathematics as bewitched by the power of language. He is an Associate Lecturer in Business Communication at the University of the Arts, London, and an experienced charity trustee.

Sarah Manson is our other co-founder.  She worked in academic and children’s publishing for many years, was a professional school librarian, and subsequently ran a literary agency.  She has founded and run several charity projects and is excited that Number Sense can deliver much-needed support to young children and also provide a rewarding opportunity for volunteers.

Gelena Rozenberg has worked in financial services in the US and the UK.  She is currently specialising in business strategy, product development and change management.   Before entering finance, she obtained a degree in elementary education, since when she has been involved in a number of volunteering initiatives focusing on development, education and empowerment.

Stephanie Sanchez Kuong is a Portfolio Manager at Enko Capital Management having previously worked as a rates trader. She has a degree in Finance from Oxford University and in Applied Mathematics from Ensimag, Grenoble. Having tutored many students, she realises that the first obstacle children face in maths is a psychological one, with small difficulties snowballing into big fears – so she is very enthusiastic about Number Sense’s focus on building confidence.