The Dyscalculia Assessment is a tool for investigating pupils' numeracy abilities. It is designed to inform a personalised teaching programme for individuals or small groups of pupils who have difficulties with numbers. The assessment was devised at Emerson House, a specialist centre in London supporting pupils with difficulties in numeracy and literacy. The bestselling first edition of the book, written by Jane Emerson and Patricia Babtie, was the winner of the ERA Best Special Educational Needs Resource 2011.