Work in Progress
Please pardon our progress while we refine the look and functionality of our new ALEX site! You can still access the old ALEX site at If you would like to share feedback or have a question for the ALEX Team, you can use the contact form here, or email us directly at

NOTICE: The old ALEX site at will not be accessible on March 31st. Please contact if this may cause an issue with a scheduled event/deadline.



  • Round
  • Place value
  • Ones
  • Tens
  • Hundreds
  • Thousands
  • Ten thousands
  • Approximately
  • Halfway point


Students know:

  • The relationship among positions of digits in a number and place value. They can use that knowledge to round numbers to nay place.


Students are able to:

  • Use place value strategies to round multi-digit whole numbers to any place.


Students understand that:

  • rounding multi-digit numbers is an estimation strategy used when writing the original number as the closest multiple of a power of 10.