Verwachte tijd

What happened to the cup?

Physics 15 16 17 18
Transparent plastic cups are disposable and have thin walls. They are available in vending machines and are primarily used for cold drinks. Are there reasons why this type of...

Face on Mars

Physics 14 15 16 17 18
Some years ago something funny happened around Mars. NASA’s Viking 1 spacecraft was orbiting the planet, snapping photos of possible landing sites for its sister ship Viking 2, when it...

Why did mammoths become extinct?

Biology 11 12 13 14
Scientists have presented two claims: climate change or human hunters. In this lesson students apply their knowledge of evolution and study evidence to decide which...

The Hypothesiser Lifeline

10 11 12 13 14 15 16 17 18
The Hypothesiser Lifeline is an example of a cognitive scaffold that can be built into TEMI methodology. A cognitive scaffold summaries the processes students need to follow...

The Mysterious Atom

Physics 11 12 13 14 15 16
What is inside an atom, and how can we find out? Our ideas of atomic structure have changed over time. This process is still happening at CERN as...

The timely prediction

Mathematics 10 11 12 13 14
A random number is freely generated by the learners for the teacher to magically match it to a prediction...

Your numbers divided

Mathematics 15 16
On this mystery, you are able to predict numbers that exactly divide a series of random numbers chosen by students.

The card colours command

Mathematics 15 16
A shuffled pack of cards seems to be under the control of your voice commands, as you can predict the number of red and black cards in two piles...

Solid or liquid?

Chemistry Physics 12 13 14
Some materials do not act ‘normally’ when you exert a force on them. They become either more liquid or...

Red Moon

Astronomy Physics 16 17 18
When the Moon travels through the Earth’s shadow sunlight is blocked. However, instead of turning dark...

Guess the colour!

Physics 12 13 14 15 16 17 18
The colour of the objects around us depends on the surface of the object, on the colour of the light and...

A flower hidden by the cold

Physics 12 13 14 15 16 17 18
A toy balloon filled with air is immersed in liquid nitrogen and the air seems to disappear...

Field trip with ghosts?

Chemistry Physics 13 14 15 16
A strange noise came from the kitchen: a can of oil has fallen down from the oven and something or someone...

The curved light

Physics 12 13 14 15 16 17 18
Light rays propagate rectilinearly... Why is the laser light in the Plexiglas pan filled with water curved?

Closer but colder

Astronomy General science Mathematics Physics 12 13 14 15 16
Earth is farther away from the Sun in July than it is in January. But we have colder...

The chi wheel

Physics 11 12 13 14
Can people really move objects through the power of their mind? In this lesson, students witness the amazing chi wheel, which claims to work by...

To dissolve or not dissolve

Chemistry 11 12 13 14 15 16 17 18
Two glasses are half full of clear liquid. When a teaspoon of salt is added to both and stirred, it dissolves in one...

The (un)reliable indicator

Chemistry 16 17 18
Students are testing different substances for the pH value. Some students are testing crystal (alum) deodorants using a red cabbage...

The sea-sand overseas

Chemistry 15 16 17
The mystery deals with sand that stays dry when water is poured onto it. Students are requested to find ways to build sand castles with this 'dry'...

The murder of the jeweller

Chemistry 14 15 16 17 18
The mystery revolves round a detective story. A jeweller has been murdered: the suspects are his metal suppliers but...

The mystery of Gibraltar

Chemistry 12 13 14 15 16
Sailors who were passing through the strait of Gibraltar observed a strange fact. They found that water was...

The disappearing lab report

Chemistry 16 17
This mystery deals with a laboratory report in which the written results suddenly vanished. The students need to find out how the writing...

Mysterious eggs

Physics 13 14 15
This mystery allows the students to make a hypothesis based on the old advice saying that a rotten egg floats when it is put into fresh water while...

Grit on the streets

Chemistry 14 15
A common misconception is that gritting the sidewalk causes the temperature to increase and thus melt the ice. However, it is actually the...

Gelli Baff®

Chemistry 16 17 18
Sarah and Philip were taking a bath with Gelli Baff. The viscous hydrogel was great fun. Now they want to drain the bathtub. How can they force...

Eating nails

Chemistry 12 13 14 15
Are we really eating nails? How can there be iron in our cereal? The mystery here demonstrating that iron filings can be extracted from a sample of breakfast cereal.

The cola-Mentos fountain

Chemistry 13 14 15 16
The Internet provides a large number of videos about the cola-Mentos fountain. To produce as high a fountain as possible, students need to enquire behind...

The clock reaction

Chemistry 15 16 17
Two translucent liquids are mixed. At first, nothing happens: the resulting solution is still translucent. Suddenly, with no warning, the solution turns blue-black all at once.

Chemical seesaw

Chemistry 11 12 13 14
A balance is set up with two pieces of iron wool. One piece is set alight: it appears to be getting smaller but, mysteriously, the balance tips the other way.

Chemical garden

Chemistry 12 13 14 15 16
The chemical garden is a well-established experiment from the chemistry of salts, solubility, diffusion, and solutions. The nice thing is that if metal salts are put in...

The chameleon bubbles

Chemistry 14 15
Chameleon bubbles are alginate bubbles that emerge when a sodium alginate solution is dropped into a calcium chloride solution – just like how bubbles...

Red or blue flowers?

Biology 14 15 16
The teacher couldn't decide whether to wear a red flower or a blue one, so they decided on a compromise: a half red, half blue flower! But...

The leaking bag

Biology 16 17
Two beakers will be displayed at the front of the room. Both look identical in that they both contain a plastic zip-lock bag with a starch solution inside...

TEMI handboek

Dit boek introduceert een nieuwe uitdagende manier om wetenschappelijk les te geven in de klas. TEMI onderscheidt zich met vier innovaties: het gebruik van mysteries, de 5-E leercyclus, presentatietechnieken en het geleidelijk loslaten van de verantwoordelijkheid van de docent naar de leerling.