Task The focus of this unit is on developing and using good number sense. Good number sense includes knowledge about how numbers are structured in our number system, a large repertoire of known number relationships and a model of what it means to add and subtract. In this unit, young primary students are just beginning to build knowledge and experience in these three areas. This first formal assessment the students where walked through each question. They had to use their experiences and knowledge from class to answer each question.

Math Standards 1.O Number Sense 1.1 Explore and use mathematical materials and tools to solve problems 1.2 Counting quantities up to Develop strategies for organizing collections of objects so that they are easy to count and combine 1.4 Use numerals to record how many for quantities up to Represent quantities with pictures, objects and on fingers 1.6 Explore different ways to arrange a set of objects 1.7 Using number combinations to describe different arrangements of a set of objects 1.8 Find combinations of numbers up to Find the total of two quantities for total up to o Find the greater of two quantities for total up to Use pictures, objects, and dot patterns to model number combinations 1.12 Record strategies for solving problems, using pictures, numbers, words and equations 1.13 Read, write and sequence numbers to Develop strategies for story problems that involving combining and separating

Student Commentary Each student has met the Standard for the Building Number Sense Investigation Unit. They have demonstrated their knowledge of daily investigation lessons through this formal assessment. Each student will continue to work on their explanations of how they formulated their answers.