Final answer:
The phrase 'one fell swoop' means to do multiple things all at once or in a single action. It emphasizes efficiency and completion. The teacher can help the student understand by providing more examples of how it is used in context.
Step-by-step explanation:
The phrase 'one fell swoop' is an idiom that means to do multiple things all at once or in a single action. In the sentence you provided, it means that Kaylee did her science homework, geography project, and composition all at the same time. It emphasizes that she completed them quickly and efficiently.
For example, if someone says, 'I cleaned my entire house in one fell swoop,' it means they cleaned the entire house all at once, without taking breaks or doing it in separate parts.
To help the student understand this idiomatic expression, the teacher can give more examples of how the phrase is used in context. This will help the student see how 'one fell swoop' is used to express completing multiple tasks simultaneously or in a single action.