New interactive curriculum plans and website

# Unit Overview: Addition and Subtraction

## Lessons:

15 lessons

### The commutative Law of Addition using aggregation

In this lesson, we will learn about the commutative law of addition using aggregation. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 13m Video
• Transcript

### The commutative Law of Addition using augmentation

In this lesson, we will learn about the commutative law of addition using augmentation. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 14m Video
• Transcript

### Measures Contexts to Show the Commutative Law of Addition

In this lesson, we will look at the commutative law of addition in measuring contexts. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 24m Video
• Transcript

### Embedding Understanding of Equivalent Expressions

In this lesson, we will embed our understanding of equivalent expressions. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 11m Video
• Transcript

### Ten can be partitioned into pairs of numbers that sum to ten

In this lesson, we will learn about how ten can be partitioned into pairs of numbers that sum to ten. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 21m Video
• Transcript

### Reasoning with number bonds

In this lesson, we will reason about expressions using number bonds to 10. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 15m Video
• Transcript

### Numbers that Sum to 10

In this lesson, we will use knowledge of pairs of numbers that sum to 10. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 13m Video
• Transcript

In this lesson, we will learn that adding one gives one more. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 9m Video
• Transcript

### Subtracting one

In this lesson, we will learn that subtracting one gives one less. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 15m Video
• Transcript

### Consecutive numbers

In this lesson, we will learn that consecutive numbers have a difference of one. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 13m Video
• Transcript

In this lesson, we will add two to odd numbers and to even numbers. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 23m Video
• Transcript

### Subtracting two

In this lesson, we will subtract two from odd numbers and from even numbers. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 17m Video
• Transcript

### Adding and subtracting with 5 and 3 and with 6 and 3

In this lesson, we will learn that addition and subtraction facts for the pairs 5 and 3, and 6 and 3, can be related to known facts and strategies. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

• 12m Video
• Transcript