What can Frances use?

This Application Problem is a part of the Lesson 14, Unit 7, Grade 2. Frances is moving the furniture in her bedroom. She wants to move the bookcase to the space between her bed and the wall, but she is not sure it will fit. Talk with a partner: What could Frances use as a measurement tool if she doesn't have a ruler? How could she use it? Show your thinking on your personal white board using pictures, numbers, or words.