As a way to help my students learn to read and use thermometers, I introduced a daily temperature journal that can be folded like a brochure.
Each thermometer has a different scale, counting by 5, 2, and 1. Helping students to really pay attention to the scale.
For 5 minutes each day we talk about the temperature.
Then students record the temperature for the day and color in a thermometer to show the temperature.