Deutsche Version

Correlate to Everyday Ideas

Pupils possess ideas about phenomena that they encounter in everyday life. These do not usually match with the scientific concepts that are supposed to be learned at school. A simple substitution of the "false ideas" or "misconceptions" by the "correct" scientific concepts is not possible, as everyday ideas are transferable in their context. They are to be rather disclosed and verified in the lessons, and confronted from a scientific point of view, so as to facilitate a conscious transformation of perspectives, depending upon the context conditions.

Everyday chemistry

Julia Freienberg and Alfred Flint present a lesson sequence with the title "lemon juice and pipe-free". An enclosed shopping list also includes:

Methylated spirits

Red cabbage

Marble windowsill

Black tea

Lemons

Poultry bones

Lemon juice concentrate

Descaler with citric acid

Vinegar essence

Other descaler

Table vinegar

Vinegar-based cleaner

Mineral water with CO2

Ammoniac pastilles

Oven cleaner

Various cleaning agents

Does this shopping list make you curious?
A short excerpt from the classroom handout gives a first insight into the ideas of this teaching concept:

We consider the introduction of the "acids" topic by way of the example of lemon and vinegar purposeful. The students directly correlate this with the term "sour / acidic".

The colour variations caused while using lemon juice and vinegar in the household for example, in the preparation of foods (red cabbage) and drinks (black tea with lemon against common cold) can serve as "pointers" (indicators) for the "acidic" property.

Here you can download the entire handout with elaboration of the lesson unit (in German language):

Freienberg/Flint, "Everyday chemistry" by the example of LEMON JUICE AND "PIPE-FREE" (PDF, 207 KB)