Lesson Plan #1: Welcome to Hanna’s House

Learning objective

The pupils will learn about the 9 hazard pictograms that are used for hazard labelling of chemicals in a bid to help them understand the significance of the different hazards.

Grade

2th and 3th grade (approximately 8-9 years old)

Duration

One or two lessons or 45-90 min.

Materials

Household chemicals with different kinds of hazard pictograms on the label, e.g. toilet cleaner, dishwasher detergent, shoe or textile impregnation spray and lime scale remover.

Lesson

Introducing the hazard pictograms

  • Many chemical products can be dangerous to your health or the environment.
  • Most of the chemicals you might use are not dangerous if you use them in a correct way and know what to do if something goes wrong.
  • Some chemicals need more careful handling than others.
  • Reading the label and being familiar with the hazard pictograms can help you identify the more hazardous chemical products and tell you what the hazards are and how to avoid them, for example by using gloves and safety goggles.
  • A hazard label is made up of specific symbols (known as ‘pictograms’) and warnings.
  • These pictograms, and the wording that supports them, are set out in the law. It is the companies supplying the chemical products that must use them where hazardous properties have been identified.
  • A chemical is not just something used by scientists in laboratories. Most people use chemical products in their home every day e.g. for washing and cleaning and other housework. Many people also use chemicals on their jobs.

Visit Hanna’s House

  • Show your pupils a selection of products with hazard labels. Ask them what they think that the pictograms on the labels mean.
  • Launch the website with the projector. If your pupils can’t read yet, read the text for them.
  • Now guide your pupils through the 9 situations using the projector.

Ending of lesson

  • Allot 10 minutes at the end of the lesson. Project the 9 hazard pictograms onto the wall. Are your pupils able to answer the following questions about the hazard pictograms?
  • Which kinds of products have you found that are labelled as flammable?
  • What are the hazards and how do you avoid them?
  • Which kinds of products are have you found that are labelled as corrosive?
  • What are the hazards and how do you avoid them?
  • Which kinds of products are have you found that are labelled as hazardous to health?
  • What are the hazards and how do you avoid them?

Try the quiz

  • Close this lesson by letting the pupils do the hazard pictogram test on the website. How did they do?