Gill has extensive experience of teaching in schools. After studying for her degree in Mathematics, and her Masters degree, she taught in primary school for a few years, before moving to teach in secondary school, where she could specialise in the teaching of Mathematics. During her time in secondary school, she became a Head of Department, and later she moved to the position of ‘Excellent Teacher’ within her school, where she could focus on her passion for the teaching and learning of Mathematics. She also had the responsibility of whole school Numeracy training across the curriculum, and became the Primary school link teacher for Numeracy, which involved weekly input in mathematics in the feeder primary schools. Gill has been actively involved with the Mathematical Associations throughout her career, and is an Accredited Professional Development Lead for the NCETM on the teaching and learning of primary and secondary mathematics. She is currently involved in running CPD for the NCETM on primary maths subject knowledge enhancement.