Ice on a String
You will need: Ice, bowl of water, string, salt, and spoon.
you still have the ice block from the previous experiment, try this trick on
the ice floating in the bowl of water and cut a short length of string, some 6
or 7 inches long.
Ask your friend if he can lift the ice from the water
with the aid of the string.
When he finally admits himself defeated^ show him how
this may be done.
Moisten one end of the piece of string and place it on
top of the ice. Sprinkle a spoonful of salt over it, as shown in Fig. 2. The
salt will melt the ice around the string, but after a time the ice will freeze
over again, this time trapping the end of the string.
pulling gently on the string you will be able to lift the block of ice clear of
Children learn best through doing
Before children can
understand a thing, they need experience: seeing, touching, hearing, tasting,
smelling; choosing, arranging, putting things together, taking things apart.
Experimenting with real things.
Old-time school teaching
used only words and the teachers thought children knew something if they could
repeat it. Now we know better. To reach practical understanding we do not need
to use many words with young children.
clever. They learn a lot, without being taught. The greatest skill - to be able
to talk, to communicate is learnt outside school. In the classroom it's the
children who need to talk the most. Unfortunately it is the teacher who does
most of the talking!