Topic E’s Lesson 1 begins as students represent teen number decompositions and compositions by writing addition sentences. In Lesson 2, students make bonds with materials and hide one of the parts for their partner who must figure out what the hidden part is. The number bond with a hidden part is represented by the teacher as an addition equation with a missing addend, the hidden part (aligns to 1.OA.8). In Lesson 3, students compare teen numbers by counting and comparing the extra ones. For example, students decompose 12 into 10 and 2, and 16 into 10 and 6. They compare 2 ones and 6 ones to see that 16 is more than 12 using the structure of the 10 ones (MP.7). This is an application of the Kindergarten comparison standards (K.CC.6, K.CC.7), which move into the Grade 1 comparison standard (1.NBT.3). In Lesson 23, students reason about situations to determine if they are decomposing a teen number as 10 ones and some ones, or composing 10 ones and some ones to find a teen number. They analyze the number sentences that best represent each situation (K.NBT.1). Throughout the lesson, students draw the number of objects presented in the situation (K.CC.5).
Kindergarten Mathematics Module 5, Topic E
Resources may contain links to sites external to the EngageNY.org website. These sites may not be within the jurisdiction of NYSED and in such cases NYSED is not responsible for its content.