Number Theory
Sprout (Ages 4-7)
Counting Forever Up
Discover Counting Forever Up as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.
10 min
+10 XP
The Doubling Game: Adding a Number to Itself
Discover Doubling Game as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.
10 min
+10 XP
Adding Up Lines
Discover Adding Up Lines as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.
10 min
+10 XP
Halving Fair Share
Discover Halving Fair Share as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.
10 min
+11 XP
Even Odd Numbers
Discover Even Odd Numbers as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.
10 min
+11 XP
Take-Away Tricks: Subtracting Without Counting on Fingers
Discover Subtraction Tricks as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.
10 min
+11 XP