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      Looking after our teeth: plan and do (non-statutory)

      Lesson details

      Learning outcome

      I can investigate what damages teeth and how to look after them.

      Key learning points

      1. Humans have two sets of teeth in their lifetime; the teeth you have as a child are replaced by adult teeth.
      2. A build up of plaque can lead to tooth decay.
      3. To look after your teeth, visit the dentist for regular check-ups and brush twice a day with fluoride toothpaste.
      4. Food and drink that contains lots of sugar can cause tooth decay.
      5. Scientists investigate which drinks are harmful to teeth.

      Keywords

      • Teeth - Teeth are used to break down food before it is swallowed.

      • Enamel - Enamel is the hard shiny outer layer covering the surface of a tooth.

      • Plaque - Plaque is a sticky substance which forms a coating on teeth and gums.

      • Decay - When teeth decay, they gradually break down and rot away.

      • Fluoride toothpaste - Fluoride toothpaste is very effective in preventing tooth decay.

      Common misconception

      Pupils may believe that sweet food is bad for the teeth and savoury food is good for the teeth. Also, that drinks do not contain sugar and therefore cannot be harmful to teeth.

      As you look at the effect of different drinks on teeth, children will be able to see that it depends on the sugar content of the drink. High levels of sugar cause damage to teeth.

      Teacher tip

      Be sensitive to children who may struggle to access dental products to keep their teeth clean and have access to healthy foods.

      Equipment

      See additional materials for further guidance.

      Content guidance

      Risk assessment required - equipment

      Risk assessment required - equipment

      Exploration of objects

      Supervision

      Adult supervision required

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Which of these people help to keep your teeth healthy?

      doctor
      Correct answer: dental hygienist
      optician
      Correct answer: dentist

      Q2.
      Humans have sets of teeth in their lifetime.

      Correct Answer: two, Two, 2

      Q3.
      Match the teeth to their shape.

      Correct Answer:molars,wide, flat and bumpy

      wide, flat and bumpy

      Correct Answer:incisors,sharp and flat

      sharp and flat

      Correct Answer:canines,sharp and pointed

      sharp and pointed

      Q4.
      Match the teeth to their function.

      Correct Answer:molars,chew and grind

      chew and grind

      Correct Answer:canines,rip and tear

      rip and tear

      Correct Answer:incisors,cut and bite

      cut and bite

      Q5.
      Scientists make predictions before they carry out an investigation. What is a prediction?

      a plan to show them what to do
      a table to collect data
      a resource list of equipment
      Correct answer: a guess about what they think will happen

      Q6.
      Teeth are part of which system in our bodies?

      circulatory system
      nervous system
      Correct answer: digestive system
      muscular system

      6 Questions

      Q1.
      Humans have two sets of teeth in their life time. What is the first set of teeth called?

      false teeth
      Correct answer: deciduous teeth
      permanent teeth
      evergreen teeth

      Q2.
      The sticky pale yellow material that can build up on teeth is called ...

      Correct Answer: plaque, Plaque.

      Q3.
      Which of these things should you do to keep your teeth healthy?

      Eat lots of sweets.
      Correct answer: Brush you teeth at least twice a day.
      Drink lots of sugary drinks.
      Correct answer: Visit the dentist regularly.
      Correct answer: Use a toothpaste with fluoride in it.

      Q4.
      A build up of plaque can lead to tooth ...

      Correct Answer: decay, damage, ache

      Q5.
      Which of these drinks would cause the most tooth decay?

      water
      Correct answer: sugary drink
      milk

      Q6.
      Which of these questions could a scientist ask if they were investigating tooth decay?

      Correct answer: Which of these drinks causes the most damage to teeth?
      Which of these drinks tastes the nicest?
      Which of these drinks is the cheapest?

      To help you plan your 4 science lesson on: Looking after our teeth: plan and do (non-statutory), download all teaching resources for free and adapt to suit your pupils' needs...