This fully updated edition helps practitioners in understanding the distinction in the 2012 revised EYFS between the prime and specific areas of development for one-year olds. It considers key issues in a well-rounded assessment of individual ones and includes a useful checklist to help practitioners prepare for the assessment of ones. This book gives advice on how to: use sensory materials to develop motor skills; best encourage communication skills, and the importance of chatting to even very young babies; and support babies when upset and along their journey towards self-regulation.