About AimNine
AimNine helps people preparing for the CELPIP-General test practise the writing part: a Task 1 email and a Task 2 survey response, written under the real time limits, with an estimated level for each of the four dimensions raters use and feedback on the exact sentences that hold the level back.
Independent practice tool. Not affiliated with or endorsed by Paragon Testing Enterprises. CELPIP is a trademark of Paragon Testing Enterprises. Levels shown here are estimates, not official scores.
How the levels are estimated
Your response is rated against the public CELPIP Writing performance standards and level descriptors: Content/Coherence, Vocabulary, Readability and Task Fulfillment, each on the CELPIP scale from M to 12. An AI model (Anthropic's Claude) does the rating, following detailed instructions about what separates one level from the next. Every level comes with the reasons and quotes from your text, so you can check them.
How we test the accuracy
Paragon publishes a small number of real test-taker writing responses with their official levels. We use them only to test the scorer, never as practice content: we rate each one without seeing its level and compare.
Result: on 36 officially scored responses, our level was within one level of the official one 88% of the time, and 0.6 levels away on average. Each response was rated twice, and every rating was checked with a correction fitted without that response (leave-one-out). The set is small, so we keep adding responses whose official scores test takers share with us.
Took the test recently? If you share your official writing score and a practice response written around the same time, we'll add free pass time to your account. Write to hi@aimnine.com.
Your writing stays yours
Responses are kept for 90 days for your progress chart, then deleted, and never used to train AI models. Details in the privacy policy.