Master Teacher lessons
Big Idea:
The big idea of this lesson is the understanding that addition can be represented as parts of a whole and that we can use addition sentences to represent those parts.
Big Idea:
The big idea of this lesson is that students can solve for near doubles by thinking of the related doubles fact.
Big Idea:
Making ten is one of the foundational strategies for developing flexible numerical thinking, accuracy, and efficiency.
Big Idea:
Students apply their understanding of addition to solve related subtraction problems.
Big Idea:
The big idea of this lesson is thinking about subtraction facts with 0, 1, and 2 as amounts less than a number.
Big Idea:
The big idea of this lesson is that students can think about doubles facts as world situations to help commit them to memory.
Big Idea:
The big idea of this lesson is that addition and subtraction facts are related, and every subtraction fact has a related addition fact. Students can think of this inverse relationship when recalling basic subtraction facts.
Big Idea:
Students can use their knowledge of using addition to make ten to help them find the related subtraction fact.
Big Idea:
The big idea of this lesson is that three (or more) numbers can be grouped together and added. The order of this grouping doesn't matter.
Big Idea:
Students play a favorite card game which practices the quick and accurate recall of double facts.
Big Idea:
The big idea of this lesson is the understanding that the number relationships between 0 more than, 1 more than, and 2 more than lay the foundation for the basic addition facts with 0, 1, and 2.
Big Idea:
One of the Four Critical Areas of 2nd grade math is the application of understanding of models for addition and subtraction. An efficient way to do this is to develop strategies built on what students know.
Big Idea:
Students need to experience real life math situations. They also need to become comfortable sharing their understandings with others.
Big Idea:
This lessons starts with a concrete representation of a change unknown problem and then pushes students to think abstractly and develop number sentences to solve change unknown word problems.
Big Idea:
One Common Core goal for second grade is the ability to use place value in the addition and subtraction of numbers to 100. This lesson is a foundation for this skill.
