Where We Are in Place and Time
Unit 2: September 23 - November 1, 2019
Central Idea
When and where we live influences our way of life.
Lines of Inquiry
- How people live differently based on their geographical locations.
- How aspects of the past still influence us today.
- Why some behaviors and practices have changed or remained the same over time.
Reading
Math
Eureka Module 2- Introduction to Place Value Through Addition and Subtraction Within 20
In this unit, students add and subtract within 20. Their work begins by modeling “adding and subtracting across ten” in word problems and with equations. Solutions involving decomposition and composition like that shown to the above for 8 + 5 reinforce the need to “make 10.” In Module 1, students loosely grouped 10 objects to make a ten. They now transition to conceptualizing that ten as a single unit (using 10 linking cubes stuck together, for example). This is the next major stepping-stone in understanding place value, learning to group “10 ones” as a single unit: 1 ten. Learning to “complete a unit” empowers students in later grades to understand “renaming” in the addition algorithm, to add 298 and 35 mentally (i.e., 298 + 2 + 33), and to add measurements like 4 m, 80 cm, and 50 cm (i.e., 4 m + 80 cm + 20 cm + 30 cm = 4 m + 1 m + 30 cm = 5 m 30 cm).