I have a friend who home schools her four girls. Before you begin making your judgments about what homeschool is or is not, please hear me out. One thing I've learned from discussing homeschooling with Dawn is, her girls have authentic experiences with math concepts on a regular basis. Her oldest daughter has a solid understanding of measurement concepts, this I know based on your demonstration of her understanding.
So what's my point? It is the experiences with measurement that help to shape and deepen our understanding of its concepts. What does this look like in a classroom setting?
It looks like activities where students engage with the tools and connect the use of the tools to understanding the concepts. An experience measuring how tall you are compared to your friends or teacher and what you used to determine the heights are retained more than completing a worksheet on "Which item is taller" or "What tool would you use to measure..."
Many of these types of activities can be found within resources like Math Solutions' Investigations, Tasks, and Rubrics to Teach and Assess Math; John Van de Walle's Student Centered Mathematics or Math Solutions' Sizing Up Measurement. If these resources are unavailable to you, take a lesson from homeschooling and create authentic everyday measurement activities to implement in the classroom.
For more ideas, you can visit my webpage Sensible Mathematics https://sites.google.com/site/sensiblemathematics/.