**Title:** Measuring Monsters!

**Digital Tool:**
PBS Kids Interactive Activity

**Web Address URL:**
http://pbskids.org/cyberchase/math-games/sleuths-on-the-loose/

**Standard(s): **

[MA2013] (1) 12: Add within 100, including adding a two-digit number and a one-digit number and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method, and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten. [1-NBT4]

[MA2013] (1) 16: 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. *Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.* [1-MD2]

[MA2013] (2) 1: Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. (See Appendix A, Table 1.) [2-OA1]

**Digital Tool Description:** This interactive activity engages students in measurement with nonstandard units and critical thinking to apply measurement of one object in order to figure out the size of a new object.