Here are a few great sites to use when learning about thermometers and temperature:
Math is Fun:
This thermometer shows the temperature in both Celsius and Fahrenheit. As you change the temperature, the image will change to reflect the current outdoor conditions.
Topmark's Thermometer Practice:
Practice reading horizontal or vertical thermometers. You can also choose to find the difference in temperatures. Celsius only.
Use this interactive thermometer to practice reading temperatures and differences. This thermometer is customizable, you can choose the minimum and maximum temperatures, intervals, move the slider to mark a temperature, and use the marker to note the previous location.
Students practice reading temperatures with this interactive quiz. Fahrenheit only.
Choose Fahrenheit, Celsius, or Kelvin and then click and drag the images/events to their correct temperatures.
Conduct a virtual experiment to see how different insulators help regulate the temperature of liquids over time.