Illuminations: Light in the Ocean
Illuminations (National Council of Teachers of Mathematics)

In the first lesson, students make a conjecture about how the intensity of light changes as a function of the depth of the ocean.

Illuminations: Gather Data
Illuminations (National Council of Teachers of Mathematics)

To test their conjectures, students gather data using one of three different methods: using a simulated online dive; covering a tank with plexiglass to simulate ocean water; or, incrementally filling a column with water to simulate increasing depth.

Illuminations: Reflect On Your Work
Illuminations (National Council of Teachers of Mathematics)

This lesson contains extension activities that can be used as follow-ups to the light intensity investigation.