Singapore Math - Primary Mathematics Mastery and Beyond 4B 26-07 Each pair features UV400 lenses

Each pair features UV400 lenses that shield your child’s eyes and surrounding skin from 100% of harmful UVA/UVB rays

DurableBabiators' sunglasses are built to withstand every adventure kids and life throw at them

Book 3A covers numbers to 10

Leather logo on the brim

Singapore Math - Primary Mathematics Mastery and Beyond 4B 26-07 Each pair features UV400 lensesMastery & Beyond is a distributed practice workbook. It provides practice of essential math concepts at select points to help students make connections. While the Additional Practice is for daily use, Mastery and Beyond is intended to be used at key points in a chapter after multiple lessons. Note: Two books (A and B) for each grade correspond to the two halves of the school year. Answer key in back of book. Soft cover.