Activity Introduction

In this lesson, students learn about how teeth can repair themselves through remineralisation.

They carry out a simple experiment to learn about how things can dissolve in solution, and then explore ways of separating substances from each other. The lesson finishes, like the previous lessons in the unit, with a reflection on teaching. The reflection will support the learning in the final lesson in the unit, Communicating the Science of Tooth Decay.


Learning Intentions

  • Students understand some of the different scientific techniques for separating substances from each other
  • Students learn about how teeth repair themselves after eating.

Lesson & Curriculum Details

  • Topic: Consumption. 
  • This lesson is part of the wider unit of work SugarByHalf – Science – Years 9-10
  • Time required: 65 mins.
  • Level of teacher scaffolding: High – monitoring experiments and student research. 
  • Keywords: SugarByHalf, Australian Dental Association, sugar, teeth, dissolving, dissolution, remineralisation, experiment. 

To view our Australian Curriculum alignment click here.

To view our NZ Curriculum alignment click here.

Cool Australia’s curriculum team continually reviews and refines our resources to be in line with changes to the Australian and New Zealand Curriculums.

Resources Required

  • A jug for boiling water
  • Beakers
  • Sugar cubes
  • Stephan Curve image


These lessons were developed in partnership with SugarByHalf and the Australian Dental Association.


Teacher Worksheet

Teacher Preparation

Learning intentions: Students understand... 

  • … some of the ways of separating substances from each other
  • … how teeth repair themselves after eating.

Success criteria: Students can…

  • … better manage their oral health
  • … reflect critically on the practice of teaching and learning.

Teacher content information:

SugarByHalf ( promotes action to reduce sugar-related diseases so that we can live better, stronger and healthier lives.

Their message is simple: to reduce added sugar consumption by half. Eating too much added sugar is a key driver of serious health problems including obesity, type 2 diabetes, heart disease, tooth decay, dementia and mental health conditions. A poor diet also puts children behind their peers, impacting their brain development, sleep and ability to learn. Poor diet choices ultimately mean that this generation of children could be the first in modern history to live shorter lives than their parents

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