I wrote this Lesson-Note-Nursery-One-Third-Term-Mathematics-Week-1 based on the Nigerian National Early Childhood Education Curriculum. Particularly, I used the Pre-Primary Teaching Schemes that the Education Resource Centre, Abuja developed in 2014 – contact us if you want this scheme. This scheme is the same as those of the other 36 states’ education resource development centre. Nonetheless, I only crosschecked this topic in that of Lagos, Kano and FCT only. Regardless, this lesson note is suitable for use in any Nigerian school that adopts the National Curriculum.