• # Resources By Unit

Below is a brief description of the topics for each unit. Links to videos are provided to help you understand instructional strategies being taught in class.

Module/Unit 2: Introduction to Place Value Through Addition & Subtraction within 20

Module 2 serves as a bridge from problem solving within 10 to work within 100 as students begin to solve addition and subtraction problems involving teen numbers. There are 3 levels when introducing addition and subtraction to Kindergarten and 1st Graders. See picture below.

Though many students may continue to count on as their primary means of adding and subtracting, the larger purpose of composing and decomposing ten is to lay the foundation for the role of place value units in addition and subtraction.

Students will learn to use the associative and commutative properties. An important aspect of building conceptual understanding for students is using visual models, so students will use number bonds and concrete materials often. Teaching students a variety of strategies with addition and subtraction will empower students in later modules and future grade levels to compose and decompose place value units and work adeptly with the four operations.

Students are learning to reason abstractly and quantitatively. Students solve change unknown problem types such as, “Maria has 8 snowballs. Tony has 15 snowballs. Maria wants to have the same number of snowballs as Tony. How many more snowballs does Maria need to have the same number as Tony?” They write the equation 8 + __ = 15 to describe the situation, make ten or count on to 15 to find the answer of 7, and reason abstractly to make a connection to subtraction, that the same problem can be solved using 15 – 8 = __.

Some of the video links below will take you to another school website, where the teachers have created short homework videos to help parents help their students. If you have questions on homework, refer to the number in the top right corner of the worksheet and then find the corresponding video link below.

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