This activity, geared towards helping students understand basic measurement and measuring tools, contains two printable pages and an interactive assessment. One page shows a ruler marked with two, four, and seven units, and the second page shows eight wiggly pink worms. Students use the printed ruler to measure the worms. When they enter the measurements on the activity site, they get feedback as to whether the measurements are right or wrong.


  • Mathematics > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
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Grade 2,Early Elementary,Grade 1,NSDL,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-016,Elementary School,Informal Education,Mathematics,oai:nsdl.org:2200/20120614151512186T



Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution Non-Commercial Share Alike


Update Standards?

CCSS.Math.Content.1.MD.A.1: Common Core State Standards for Mathematics

Order three objects by length; compare the lengths of two objects indirectly by using a third object.

CCSS.Math.Content.1.MD.A.2: Common Core State Standards for Mathematics

Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps.

CCSS.Math.Content.2.MD.A.1: Common Core State Standards for Mathematics

Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
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