A ‘branching database is a must-try activity for sorting items and classifying animals.
Materials which set up vibrations in the air make sound. These vibrations are little ‘puffs’ of higher air pressure followed by gaps of lower air pressure …
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Roger Frost (his cv) has been writing about technology for all the years since 1988 and this web includes his articles; tutorials, radio interviews and, going back to our early days, lesson ideas for science teachers.
HOME AUTOMATION:
