Common Core Alignment

CCSS.Math.Content.1.NBT.2 - Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

5: Math

Unit 7: Place Value
Lesson 1: What Is the Base-10 System?
Lesson 2: What Is Place Value?
Lesson 4: Distinguishing Tens and Ones
Lesson 5: Practice Time!
Lesson 6: More Work With Tens and Ones
Lesson 7: Building Numbers Using Tens and Ones
Lesson 9: Playing With Bigger Numbers
Final Project: Place Value BINGO!
Unit 10: Skills Review
Lesson 2: Reviewing Place Value