PR-6171IRE Science A STEM Approach - 1st Class

Lesson 6
Materials
IT’S A STRETCH
INGREDIENTS
• 250 g packet plain digestive biscuits
• 150 g butter, melted
• 3 teaspoons powdered gelatine
(or gelatine substitute)
• 1 1 2 tablespoons boiling water
• 500 g cream cheese, softened
• 130 g caster sugar
• 2 teaspoons vanilla essence
• 300 ml double cream, whipped
• Hulled and halved strawberries, to decorate
METHOD
1. The teacher or adult should pre-prepare the
gelatine mix by sprinkling gelatine over
boiling water in a heatproof jug. Whisk with
a fork until gelatine has dissolved. Set aside
to cool and use later.
2. Ask some pupils to grease the cake tin using
butter and a paper towel. Emphasise the
action of squashing the butter onto the cake
tin.
3. Place biscuits into several sandwich bags for
pupils to crush into fine crumbs. Emphasise
the crushing and ask pupils what action they
are using.
4. Add butter to a small bowl and melt it in the
microwave. Ask pupils how the butter has
been changed.
5. Place biscuits into a large bowl and add the
melted butter. Stir until combined. Reinforce
how the biscuit crumbs changed when the
butter was added. Ask some pupils to press
the biscuit mixture over base and sides
of prepared cake tin. Refrigerate for ten
minutes until it goes hard. Ask pupils how
the biscuit/butter mixture changed in the
refrigerator.
120 Science:
A STEM APPROACH
No-bake Cheesecake Recipe
EQUIPMENT
• 20 cm-round (base) springform cake tin per group
• plastic knives
• electric mixer
• jugs
• forks
• spatula
• paper towel
• rolling pin or similar for crushing
• various bowls
• sandwich bags
• microwave
• refrigerator
6. Remind pupils of safety and ask some to
use an electric mixer to beat the cream
cheese, sugar and vanilla until light and
fluffy. Gradually beat in gelatine mixture
until combined. Ask pupils to describe what
action the mixer is doing (beating) and how
it is changing the ingredients.
7. Ask different pupils to whip the cream in a
bowl and observe how the cream changes
from runny to able to form soft peaks.
Reinforce this action as ‘whipping’.
8. Ask other pupils to fold the whipped cream
into the cream cheese mix, using a spatula.
Demonstrate how it is to be done if necessary.
Describe the action as folding and ensure
pupils observe any changes to the mixture.
9. Ask pupils to pour the mixture into the
prepared cake tin and level the top with a
spatula. Cover. Refrigerate overnight or until
set. Ask pupils how they think the mixture
will change after being cooled.
10. Meanwhile, some other pupils can use the
plastic knives to halve/slice the strawberries,
ready to decorate the cheesecake after it
has set. Ask pupils to describe how they are
changing the strawberries. Store the sliced
strawberries in the fridge until ready to serve.
Viewing sample
1st
CLASS
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