This is an interdisciplinary, whole group enrichment lesson in which students are rounding to the closest ten thousand and the closest hundred thousand. I use open number lines as a tool for rounding to the closest ten and hundred thousand.
The very specific geology content in this lesson is taught with the goal of improving reading and writing skills related to expository text. My tertiary goal in this lesson is to provide students with a look at how understanding science enables one to see stories in the landscape around them!
This STEMbite: The Science of Sand Dunes is a great, short video that gives some information about how the size of particles in sand dunes affect its movement and slope. 2 minutes long and well worth it! I actually use this at the start of the day, when the students are coming in and settling. I tell them that they are watching a short video clip about sand dunes because we will be talking about sand dunes in math today. I love their reactions when they first see the photographs of the dramatic rock cliffs and it's wonderful when a few of them realize that the rock may in fact be, basically, petrified sand!