Talk about it. Use simple words.
Give them specific meaning.
Use your hands.
Draw . Write .

 
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Some specific meanings

based on Push as a model of Electricity
            
Volt: how hard you push, voltage
Ohm: how hard it is to push, resistance
Amp: how much gets pushed, current

Direct: pushed in  one direction
Alternating: push/pulled back and forth

Series: pushing in a row
positive to negative
Volts add, Amps don't
in switches a logical "and"
Parallel: pushing side by side
positive to positive, negative to negative
Amps add, Volts don't
in switches a logical "or"

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Electric Logic

AND

switches is series
this switch AND that switch

OR

switches in parallel
this switch OR that switch

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