Question Words
It's important for students to learn the differences between the five main question words: who, what, where, when, why, and how.
These are all sight words -- because none is really easy to sound out using phonics -- so it's especially important for students to use the words in writing.
Encourage students to use the words correctly in their writing. Also use worksheets that will push the students to use the clue words in sentences to identify the appropriate question word for a specific context.