Teaching root words and word origins
Aim: Keep the root's spelling when prefixes and suffixes are added.
How to explain it
Many long words are built from a root plus prefixes and suffixes, and the root keeps its spelling: act, action, react, actor. When a long word is spelled only by its sound, the root often disappears; thinking of a relative brings it back (medicine: think of medical). A different slip is using the right root with the wrong ending, writing a real word from the family that doesn't fit the sentence.
Starter (5 minutes)
Put 'act' in the middle of the board. How many words can the class build around it? Underline 'act' in each one.
Main activity
Root detectives: give longer words (electrician, decision, medical). Children find the root, write its shortest family member and use it to explain any tricky letters. Then they choose the right family member to finish a set of sentences.
Dictation sentences
- The doctor gave me some medicine for my cough.
- We had to decide, so we made a decision.
- The electrician checked the electricity.
Watch out for
- Spelling long words only by sound (medisin, elektrishun).
- Using the wrong member of the family (happily where happiness is needed).
Quick check
Ask children to spell these without help:
- electrician
- action
- medical
- decision
Example words
- act
- action
- actor
- medicine
- medical
- electric
- electricity
- electrician
- decide
- decision
- televise
- television