About this learning preview.

Practice applying rules and making evidence-based judgments

Annotator provides practice in image annotation, text annotation and evaluation of language-model responses. Available content is listed in the task catalog and learning paths. Unavailable, unreviewed or historical snapshot materials are not selectable exercises. The learning sequence is to read the rules, attempt the task, review feedback, revise if needed and try new material of the same type.

This is an engineering preview. Courses and content undergo ongoing acceptance checks under this project's review standards. Judgment boundaries still require calibration, and the interface and content may change with revisions.

Structured results are not professional certification

Automatic results check boxes, labels, ratings and evidence for this task. One passing result describes only its structured performance. Without human review, free-text reasoning is not confirmed correct.

Revisions after seeing feedback and work on new material are retained separately. New material is assigned from known exposure and does not guarantee a person has never seen the source elsewhere. Results promise no job qualification, hiring outcome or full professional competence.

Materials and references have defined scopes

Each image task lists source, author and photo/annotation licenses. Original text and answers use fictional scenarios. Accessing this preview does not change third-party material licenses.

Task rules define what to annotate or judge. Independent examples teach methods; actual references open only after submission is locked. Do not apply one example's class, numbers or conclusion to every task.

Site access and learning accounts are separate settings

The hosting platform controls site access. Account connection, Google sign-in configuration and browser-record linking are independent feature states. Learning account sign-in does not expand site access.

Registration and the available online exercises do not require a bank card and do not automatically create subscriptions or charges. Textbooks are purchased separately at US$5 per title; one purchase includes Chinese, English and Spanish editions. The textbook page indicates whether purchases are available and whether test mode is active. For record management, seePrivacy & data processing details。

Textbook purchases and access

Selecting a textbook opens a Stripe-hosted checkout page. Once payment is confirmed, reading and download access is linked to the learning account signed in at purchase. Changing languages does not require another purchase. Opening checkout, returning to the site or a failed payment does not unlock a book. Test payments apply only in the test environment and are not live purchases.

Refunds or unresolved payment disputes affect online reading and download access. Copies already downloaded to a personal device are not automatically deleted. For purchase, refund or account ownership questions, contact the project owner through the help page and provide the relevant order information. Do not send card numbers or security codes.

Learning preferences and survey

The content-needs survey is optional and can be skipped. Responses help plan learning content, not determine job eligibility. No additional contact details are required. Do not submit sensitive personal data, other people’s information or company secrets.

Feedback disputes & feature problems

When unsure, retain evidence and explain concerns. Pending review does not automatically pass over time. For suspected reference or rule issues, keep the submission ID and material version and contact the person who invited you or raise it in the project.

No public support queue or response deadline is promised. For save failures, conflicts or unconfirmed submissions, use the page's recovery actions. See Controls & help for details.