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.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: The Meaning of Decimals
This website from The Math Page explains and defines decimals.
Cuemath
Cuemath: Decimals
You can understand the concepts of decimals in a clear way with the help of this article. Included are solved examples and interactive questions for review.
AAA Math
Aaa Math: Rounding to the Nearest Hundredth
This site explains how to round decimals to the nearest hundredth. This site provides games to practice this skill.
Math Is Fun
Math Is Fun: Comparing, Ordering Decimals
This website gives a simple, easy strategy for how to compare decimals when they have a different number of decimal places. It provides examples in ascending and descending order and an ordering game for practice.