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Handout
Web Elements

Web Elements Periodic Table: Caesium

For Students 9th - 10th
A very helpful site with a great deal of information on caesium and its properties. Very helpful. Includes an audio track of a description of this element, as well as illustrative pictures.
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Unit Plan
TED Talks

Ted: Ted Ed: Caesium or Cesium: Periodic Table of Videos

For Students 9th - 10th
The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. Here are five grams of caesium in water, but did you know caesium is also used to define the length of a second? [7:17]
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Handout
US Geological Survey

U.s. Geological Survey: Cesium

For Students 9th - 10th
This site from the U.S. Geological Survey provides a nice summary of cesium from the viewpoint of a geologist or mineralogist.