Yes
An imperative sentence is a type of sentence that gives a direct command or request. It is used to express orders, instructions, or advice. In this case, the sentence "Get ready for school now" is an imperative sentence because it is giving a command or instruction to someone to prepare for school immediately.

Explanation:
- An imperative sentence is a type of sentence that gives a direct command or request.
- It is used to express orders, instructions, or advice.
- The sentence "Get ready for school now" is an example of an imperative sentence.
- The verb "get" is in the base form, which is typical of imperative sentences.
- The word "now" adds a sense of urgency to the command, emphasizing the immediate action required.
- The sentence is giving a direct instruction to someone to prepare for school immediately.
- It does not contain a subject, as imperative sentences often do not specify the subject explicitly.
- The subject "you" is implied in the sentence.
- The sentence is clear and concise, conveying a specific command or instruction.
- It is important to note that imperative sentences can end with either a period or an exclamation mark, depending on the intended tone or emphasis.

Conclusion:
Based on the characteristics of an imperative sentence and the analysis of the sentence "Get ready for school now", it can be concluded that the given sentence is indeed an imperative sentence.