Introduction
3rd Grade Webquest on understanding place value
2.NSBT.1 Understand place value through 999 by demonstrating that:
a. 100 can be thought of as a bundle (group) of 10 tens called a “hundred”;
b. the hundreds digit in a three-digit number represents the number of hundreds, the tens digit represents the number of tens, and the ones digit represents the number of ones;
c. three-digit numbers can be decomposed in multiple ways (e.g., 524 can be decomposed as 5 hundreds, 2 tens and 4 ones or 4 hundreds, 12 tens, and 4 ones, etc.).
2.NSBT.3 Read,
write and represent numbers through 999 using concrete models, standard form,
and equations in expanded form.
2.NSBT.5 Add and subtract fluently through 99 using knowledge of place value and properties of operations.
2.NSBT.6 Add up to four two-digit numbers using strategies based on knowledge of place value and properties of operations.
Task
Students will need to understand place value and esplain how adding and subtraction works.
Process
On a sheet of paper write down the answers to the following questions:
Watch video and answer the following question: Click here for video
1. What is the ones place?
2. What is the tens place?
3. What is the hundreds place?
4. Can I have a two digit number in the ones place? Why?
5. For extra practice please play the game until you are more comfortable.
Next play this game and answer the following questions. Click here for game.
6. What is another way to say 499?
7. What is a different way to say 111?
Adding and Subtraction.
8. What is 397+230.
9. What is 678-199.
Now look at expanded form.
10. Write 659 in expanded form.
click on image for more practice 
Evaluation
Play this game and track the amount of dollars you ear. Play until you have earned enough money in the game.
You will be evaluated on if the answers you turn in are correct or incorrect.
Conclusion
The student should have a better understanding of place value. They should be able to add and subtract and explain how and why it happens.
Credits
Teacher Page
Great to see if children need extra practice or to make sure they know what they are doing.