This lesson focuses on student understanding of placement of digits and the associated value for numbers up to 3 digit numbers. This lesson includes four decks of cards which express 3 digit numbers using standard form, expanded form, base ten blocks, and words to describe the hundreds, tens and ones. Students first participate in a whole group discussion to understand how the placement of a digit in a number affects its value. Students also learn how to compare and order numbers using place value information. The greater than, less than and equal signs are used to compare numbers during the lesson. Students use base ten blocks to learn that a digit's placement determines its value. ie. 3 tens is equal to 30, but 3 ones is equal to 3.
As a summative assessment, students are given 3 digit number cards and asked to walk around the room to music. When the music stops, students are asked to find a partner and compare their 3 digit numbers. There are 4 different decks of cards which express 3 digit numbers using various forms. Students can practice ordering numbers in all forms to gain a deeper understanding of place value. Finally, students are asked to gather at a predetermined place in the room and order all the numbers from least to greatest. They are asked to explain and justify their decision.
I think this lesson would be engaging for my second grade students as a way to understand place value and how to express numbers in different forms. Since the students will be moving and explaining their thinking, I will be able to hear any misconceptions students have about place value concepts. By using the number cards, I will also be able to quickly determine which students has a thorough understanding of place value, and which students need additional support to master the concept.