In this unit the students will expand their understanding of base 10 systems to include that 100 can be a bundle of 10 tens called 100. They will also understand that 3digit numbers represent the amounts of 100s, 10s, and 1s and can be represented in different, yet equivalent, ways.
Key Concepts:
 A bundle of ten ten can be thought of as a hundred.
 The digits in a threedigit number represent hundreds, tens, and ones, from left to right.
 We can represent threedigit numbers in different but equivalent ways.
Prior Knowledge Needed:
 Understanding that 10 ones make a ten; (Grade 1, Unit 1; 1.NBT.B.2)
 Understand that the two digits of a two digit number represent the amount of 10s and 1s; (Grade 1, Unit 8; 1.NBT.B.3)
 Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral. (Grade 1, Unit 8; 1.NBT.A.1)
 Skip counting by 5s and 10s. (Grade 2, Unit 4; 2.MD.C.7)
Units on the Horizon:
 Relating skip counting to mental addition and subtraction (Grade 2, Unit 8)
 Expressing and comparing threedigit numbers (Grade 2, Unit 7)
 Applying strategies to add and subtract within 1000 (Grade 2, Unit 11)
Lessons

Lesson objective: Understand that a bundle of ten tens can be thought of as a hundred. Students bring prior knowledge of place value to the tens place from Grade 1, Unit 8. This prior knowledge is extended to place value to the hundreds place as student...

Lesson objective: Use place value representations to show that ten tens can be thought of as a hundred. This lesson helps to build fluency with place value concepts. Base ten blocks are used here because repeatedly building a hundred using tens helps to...

Lesson objective: Apply place value concept that ten groups of ten is equivalent to 100. This lesson provides an opportunity for students to apply their knowledge and understanding of composing tens to make 100 to a mathematical situation. Students are ...

Lesson objective: Understand that the three digits in a threedigit number represent hundreds, tens, and ones, from left to right. Students bring prior knowledge of place value from first grade. This prior knowledge is extended to place value representa...

Lesson objective: Represent threedigit numbers that include a zero as one of the digits. This lesson helps to build fluency with place value concepts. Base ten blocks are used here because they support visualizing the value of each digit. This work dev...

Lesson objective: Use place value concepts to solve riddles. This lesson helps to build procedural skill with place value concepts. Place value blocks and charts are used here because they support the visualization of the value of digits. This work deve...

Lesson objective: Apply place value concepts of hundreds, tens, and ones, to solve for the total amount of points. This lesson provides an opportunity for students to apply their knowledge and understanding of place value to a reallife situation. Stude...

Lesson objective: Understand that threedigit numbers can be represented in different but equivalent ways. Students bring prior knowledge of place value from Grade 1, Unit 6. This prior knowledge is extended to different representations as students use ...

Lesson objective: Represent numbers in two or more equivalent ways. This lesson helps to build fluency with place value concepts. Drawing is used here because it supports students moving on from concrete (the base ten blocks) to more representational in...

Lesson objective: Represent numbers in different but equivalent ways. This lesson provides an opportunity for students to apply their knowledge and understanding of place value to a reallife situation. Students are asked to represent the number 548 mul...