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# Unit Overview: Numbers within 15

## Lessons:

10 lessons

### Counting up to 15 objects and putting them in order (Part 1)

In this lesson, we will practise counting objects to 15 and putting them into order from fewest to greatest.

• 13m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Counting up to 15 objects and putting them in order (Part 2)

In this lesson, we will continue to practise counting objects to 15 and putting them into order from lowest to greatest.

• 14m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Counting up to 15 objects and putting them in order (Part 3)

In this lesson, we will continue to practise counting objects to 15 and putting them into order from lowest to greatest.

• 13m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Knowing one more than a number within 15

In this lesson, we will explore identifying one more than a number within 15 using concrete manipulatives to support understanding.

• 11m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Knowing one fewer than a number within 15

In this lesson, we will explore identifying one fewer than a number within 15 using concrete manipulatives to support understanding.

• 12m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Applying knowledge of one more and one fewer (Part 1)

In this lesson, we will begin to apply knowledge of one more and one fewer using a numberline to support understanding.

• 14m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Applying knowledge of one more and one fewer (Part 2)

In this lesson, we will continue to apply knowledge of one more and one fewer using a number line and a bead string to consolidate understanding.

• 13m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Using the guess and check strategy for problem solving

In this lesson, we will begin to apply the guess and check strategy to a problem involving numbers within 15.

• 11m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Ordering and exploring numbers within 15

In this lesson, we will begin to introduce ordinal numbers and explore patterns of numbers within 15.

• 16m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Consolidating learning of numbers within 15

In this lesson, we will revise our knowledge of key concepts from this unit, including equal to, greater than, less than, more than and fewer than.

• 11m Video
• Presentation(PPT)
• Worksheet
• Transcript