A new version of the district website is available at OCSD62.org.

If the new website is missing anything or you have any questions, please contact web.master@orecity.k12.or.us.

The old website (orecity.k12.or.us) will remain online in its current state until May, 2015. All new content and page edits will be made on the new site. 

Content on this site is not being updated and may not be current or correct. 


Place Value and Number Sense Activities

This page contains resources and activities to help develop the number sense and place value understandings of students at all levels.

 Place Value:

  • Counting with Base 10 Blocks (K-3) - An interactive website where students build a specified number using 100s, 10s, and 1s.  The site incorporates auditory, symbolic, base 10 and number line representations.  Great for smartboards and independent practice!
  • Place Value Cards (1-4) - This site models expanded notation with cards and base 10 blocks.
  • Place Value Sharks (1-3) - Count the base 10 blocks and identify the number.  You can choose the magnitude of the numbers.  Great for independent practice!
  • Place the Penguins (1-3) - Students drag the penguins onto the board to represent numbers with expanded notation.
  • Splat Squares (K-3) - Interactive Hundred Grid - Good for Smartboard lessons


Number Sense:

  • The Largest Number Game (2-6) Customizable to the number of digits, greatest digit, and discard spaces.  The numbers you discard still count, so this game requires some extra thinking!
  • The Estimator (K-6) - Develop Number Sense by estimating a point along a number line.  You control the scale (endpoint) of the number line.
  • Estimating Quantities (2-6) - Interactive site for students to estimate quantities, area, and number lines as 'greater than' or 'less than' a given amount.  Three levels for students to explore.
  • Make 24 (3-8) - Interactive game to practice basic number sense and order of operations. 



  • Order of Operations (5-8) - Create increasingly more complex equations, mindful of order of operations.
  • Connect Four (5-8) - Two player interactive game to review order of operations.

Oregon City School District is an equal opportunity educator and employer.