Big Idea:It is imperative that students have a strong understanding of place value in order to complete and communicate any given math task. This lesson invites them to re-explore strategies they have created prior to teaching standard algorithms.
Big Idea:Using place value and expanded notation knowledge is necessary in developing mental math ability. This lesson explores the number line as a tool to solutions to larger number addition problems.
Big Idea:Decomposing a large number into its expanded form is helpful in strengthening one's mental math ability. This lesson is designed to give the students practice in using this important strategy.
Big Idea:Journaling and using the correct math terms is essential to the communication of knowledge and strategy. Today, students will attempt to model and write about their thinking in an organized manner.
Big Idea:Often, students are expected to solve standard equations while regrouping, but they are rarely asked to show strategies outside of the traditional algorithms. This lesson prompts the students to make sense of place value before finding a solution.
Big Idea:In order to approximate a total, or to help check the reasonableness of an answer, students need to be able to round to the nearest 10 or 100. Check out this lesson for a fun game that gives them practice rounding, adding, and subtracting.
Big Idea:Students need to understand what a rounded number represents, and how that representation may be for several numbers. As the students solve various situations in this lesson, they come to know that a rounded number represents 9 different values.
Big Idea:Putting it all together is an important step that is often missed in math education. This lesson combines place value strategies, subtraction and addition strategies, as well as rounding in the form of a game. What could be better?