Students can actually think about it spatially and use manipulatives or mentally determine how many smaller boxes will fit, or they can determine it mathematically by finding the volume of both small and large boxes, then dividing. While I was at it, I created many different problems that have students working with volume in a real-world context. The 5th graders I worked with loved working on these problems and began to notice patterns with multiples and factors.
|Math - It Works|
TPT Volume Within Volume