Volume Professional Development or Cheat Sheet for quick review for teachers.
Explains both cubes and general rectangular prisms in detail - one pager.
I used to make these resources up when I met with grade level meetings to ensure all teachers were on the same page - from a teacher content and pedagogy point of view.
If the teacher has taught metric ruler accuracy and/or customary rulers, and their students are proficient with decimal or improper fraction/mixed number multiplication - it is a decent extension to place measurement with volumetric computations based on the fundamentals of this one page document.
Best with your students!