Sorting Transparent, Opaque (and Translucent) Objects Introduction Then ask each group to come up with a way in which they might sort the objects into 2 sets or categories.
Ask them to call you over when they've agreed on a way of doing this.
At this stage, the pupils might choose criteria such as shape, colour, texture, etc. Development Shiny/not shiny
Circular/not circular
Dark/bright
Rough/smooth
Hard/soft
Paper/not paper
etc.
See-Through
Not See-Through
Difficult to Classify
Glass jar
Glass bottle
Clear plastic bottle
Cling-film
Tin foil
Thick paper
Paper plates
Foil plates
Cloth
Wood
Grease-proof paper
Tracing paper
Coloured clear plastic
(e.g. wrapping on Lucozade bottle)
Some children may even be confused by the foil
If you feel that your class is up to it, you could introduce the term translucent at this stage and ask pupils to list the items which fall into this category. Closure The class teacher can call that one.