University of Regina (Canada)
University of Regina: Math Central: Integers: Grade 6 (Using Thermometer)
Scroll partway down the page to find this lesson on decimals which incorporates the use of thermometers at an activity centre.
E-learning for Kids
E Learning for Kids: Math: Market Place: Measurement: Temperatures
On this interactive site students learn to link temperature to everyday life and read informal scales on a thermometer.
PBS
Pbs Learning Media: Reading a Thermometer
In this video segment from Cyberchase, the CyberSquad learns how to read a thermometer as they try to keep their chocolate sculpture from melting.