How Do Teeth Decay?
Watch a film and discuss how a dentist fills cavities in teeth.
For example, you can ask: What is tooth decay? How can you recognise it? How do you know that you have a cavity in your tooth? What actions/steps must a dentist take – in turn – to treat a tooth? What tools does a dentist use?
Students learn about the structure of a tooth by observing objects resembling various layers of the tooth.
Give out to each group: a white ceramic or porcelain cup (or a white ceramic tile), a yellow sponge and jelly beans (for example, teddy bear-shaped – or any shape with protrusions). Then read out loud descriptions of particular tooth layers. The students’ task is to match tooth layers to objects resembling them.
View a diagram showing the structure of a tooth.
Perform an experiment that illustrates how acids produced by bacteria act on teeth and how you can protect teeth from their negative effects.
For the experiment you need a few eggs, prepared 2-3 days earlier as described in instructions.
Students check whether they know how to brush their teeth properly and learn the correct brushing technique.
Ask students to show how they brush their teeth, using their toothbrushes. Next, show the instructional video presenting Fones’ method, which is intended for children. Student repeat the movements shown in the film.
Teach your brother or sister or your best friend how to properly brush their teeth!
Prepare eggs (1 for each group) for the experiment 2-3 days before the lesson
Mark one half of each hard-boiled egg with an “X” using a marker pen. Smear this half with toothpaste. When the toothpaste dries, put the eggs into the fridge and leave them there for 2-3 days. On the morning before class, wash the toothpaste off the eggshells with water. In addition, you can use a paper towel to remove the toothpaste.
Or you can prepare the eggs in the same way together with students in school a few days before the lesson.
Students bring their own toothbrushes to class.
You will download zip file now.
- Critical thinking and drawing conclusion
AuthorsAuthors: Natalia Bratek, Sebastian Kaczor
Methodology: Joanna Miszkiel
Translation: George Lisowski
Producer: Marta Przywara