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Terms of Service

Effective date: April 25, 2026 Last updated: April 25, 2026

1. About these terms

These terms govern your use of TeachLex — the web application available at teachlex.com and any associated tools, APIs, and features (the "Service"). The Service is operated by James Saunders-Wyndham as an individual proprietor based in Osaka, Japan ("TeachLex", "we", "us").

By creating an account or using TeachLex, you agree to these terms. If you do not agree, do not use the Service.

If you are using TeachLex on behalf of a school or institution, you confirm that you have the authority to agree to these terms on its behalf.

2. Beta phase

TeachLex is currently in a beta phase. This means:

  • The Service may change significantly, including features being added, removed, or reworked
  • Pricing and plan structure may change, with notice
  • Bugs and outages are more likely than in a mature product
  • We will communicate openly when things break

When we move out of beta, we will update these terms and give you notice before the changes take effect.

3. Who can use TeachLex

You may create a teacher account if you are at least 18 years old and are using TeachLex for legitimate educational purposes.

Student accounts are created through a teacher's class. If you are a student:

  • If you are 18 or older, you can agree to these terms yourself
  • If you are under 18, your teacher or school is responsible for obtaining the consent appropriate under the laws of your jurisdiction before enrolling you. By joining a class, you confirm that this consent has been obtained
  • If you are under 13, you should only use TeachLex through a class managed by a teacher or school. We do not knowingly accept direct sign-ups from children under 13

4. Your account

You are responsible for keeping your account credentials secure. You must not share your account with anyone else, and you must notify us promptly if you believe your account has been accessed without your permission.

If you use Google sign-in, the security of your Google account is your responsibility.

Teachers are responsible for the student accounts they create or invite into their classes, including making sure enrollment is appropriate under their institution's policies.

5. How TeachLex works

TeachLex is a platform for ESL/EFL teachers to create tests, assign them to classes, and grade the results — with optional AI assistance for generation and grading. The core principle is "AI assists, teacher decides": AI produces drafts and preliminary grades; the teacher reviews, overrides, and approves.

5.1 Teachers

You may use TeachLex to:

  • Create classes and tests
  • Generate test questions, reading passages, and grading rubrics with AI
  • Assign tests to students in your classes
  • Review student responses, including AI-generated grades and feedback
  • Override any AI-generated grade or feedback before publishing it to students
  • View academic integrity data for writing submissions (keystroke timing, composition timelines, heatmaps)
  • Export your data

5.2 Students

You may use TeachLex to:

  • Join classes via enrollment code, QR code, or a teacher's invitation
  • Take tests and submit writing assignments
  • View your grades and feedback when your teacher publishes them

When you complete a writing assignment, TeachLex captures behavioral data about the composition (keystroke timing, paste events, tab-switch events, composition snapshots, and mouse interaction patterns) to give your teacher evidence of authorship. This capture is described in our Privacy Policy and a notice appears before you begin a writing session. By submitting the assignment, you acknowledge this capture.

6. Your content

6.1 Teacher content

When you create tests, questions, rubrics, reading passages, or other content in TeachLex, you retain ownership of that content.

You grant TeachLex a limited, non-exclusive, royalty-free license to store, reproduce, modify, and display that content solely to operate the Service for you and for the students in your classes.

You are responsible for the content you upload. You confirm that you have the right to use any source materials you upload for test generation (textbooks, articles, copyrighted passages) in the way you use them.

6.2 Student content

When you submit test answers, essays, writing assignments, and other work through TeachLex, you retain ownership of that work. You grant TeachLex a limited, non-exclusive, royalty-free license to store, reproduce, and display your submissions so that your teacher can grade them and so that you can review your own results.

6.3 AI-generated content

Test questions, passages, grades, and feedback generated by the AI features are produced at the teacher's request based on inputs the teacher provides. The teacher is responsible for reviewing and approving any AI output before using it with students.

TeachLex does not claim ownership of AI-generated content you produce through the Service. You are responsible for ensuring your use of that content complies with applicable law and any institutional policies.

6.4 What you must not do

You agree not to use TeachLex to:

  • Upload or generate content that is illegal, infringes someone else's rights, or is designed to harm others
  • Attempt to extract, scrape, or bulk-download content belonging to other users
  • Reverse-engineer, decompile, or attempt to circumvent security measures
  • Use the Service to build a competing product
  • Share an account with another person, or create multiple accounts to evade limits
  • Automate use of the Service at a scale that would burden our infrastructure
  • Submit writing you did not author as your own (for students)
  • Use the integrity data about students for any purpose other than evaluating their work in the class in which the work was submitted (for teachers)

We reserve the right to suspend or terminate accounts that violate these rules.

7. AI features, grading, and academic judgment

TeachLex's AI features use the Anthropic Claude API and include test question generation, short-answer and essay grading, writing profile analysis, and teacher comment generation.

You should understand:

  • AI outputs are drafts, not decisions. Every AI-generated grade, comment, or analysis is subject to teacher review. Final academic judgment rests with the teacher.
  • AI makes mistakes. Models occasionally produce incorrect, biased, or unreliable output. This is why teacher review is built into the grading workflow.
  • Integrity data is one signal among many. Keystroke timing, composition timelines, and heatmaps are behavioral evidence, not proof of plagiarism or AI use. They help a teacher decide whether to investigate a piece of work further — they do not themselves determine anything.

TeachLex is not a substitute for professional academic judgment, institutional policy, or accredited assessment. Teachers and institutions remain solely responsible for grading decisions, academic integrity rulings, and any consequences that follow from them.

8. Free and paid plans

During the beta, TeachLex is provided free of charge to invited teachers. If and when we introduce paid plans, we will:

  • Give you notice by email before the change takes effect
  • Clearly communicate what is still free and what requires payment
  • Let you export or delete your data before committing to a paid plan

The intended pricing model is pay-per-use credits for AI features (test generation, AI grading), with core functionality — class management, manual test creation, analytics — remaining free. These plans are not yet in effect. Details may change.

When paid plans launch, separate terms may apply to payment, refunds, and credit balances. Those terms will be disclosed at the point of purchase and incorporated into these terms by reference.

9. Changes to the Service

We may add, change, or remove features from time to time. For material changes that significantly reduce functionality you rely on, we will give you advance notice when reasonably possible.

We may also need to perform maintenance that temporarily interrupts the Service. We will try to schedule this outside normal working hours in Japan and announce significant planned downtime in advance.

10. Suspension and termination

10.1 By you

You can stop using TeachLex at any time. You can delete your account from your account settings or by emailing support@teachlex.com. When your account is deleted, your tests, classes, and associated student responses are deleted within 30 days, subject to backup retention as described in the Privacy Policy.

10.2 By us

We may suspend or terminate your account if:

  • You materially breach these terms
  • Your use of the Service poses a security risk to other users or the platform
  • We are legally required to
  • We discontinue the Service (see section 10.3)

Where the reason is not urgent, we will give you notice and a reasonable opportunity to address the issue before terminating.

10.3 If we discontinue the Service

If we discontinue TeachLex entirely, we will give you at least 60 days' notice and a way to export your data before the Service is shut down.

10.4 What survives termination

The following sections survive termination: 6.1 and 6.2 (licenses you've granted us, for as long as we still hold the content), 11 (Disclaimer), 12 (Limitation of liability), 13 (Indemnity), 14 (Intellectual property), 15 (Dispute resolution and governing law), and this section 10.4.

11. Disclaimer of warranties

TeachLex is provided "as is" and "as available". To the fullest extent permitted by law, we disclaim all warranties, whether express, implied, or statutory, including but not limited to implied warranties of merchantability, fitness for a particular purpose, non-infringement, accuracy, and uninterrupted operation.

Specifically, we do not warrant that:

  • The Service will be error-free, uninterrupted, or secure
  • AI-generated outputs will be accurate, fair, or free from bias
  • The Service will meet every requirement of your institution, curriculum, or regulator
  • Data, including student work and grades, will always be available or free from loss (you should export important data regularly)

You use TeachLex at your discretion and are responsible for determining whether it is suitable for your situation.

Nothing in this section excludes or limits any warranty, right, or remedy that cannot be excluded or limited under applicable law, including under Japanese consumer law or the Australian Consumer Law where it applies.

12. Limitation of liability

To the fullest extent permitted by law:

  • We are not liable for indirect, incidental, special, consequential, or punitive damages, including lost profits, lost data, lost opportunity, or reputational harm, whether arising in contract, tort, statute, or otherwise
  • Our total aggregate liability to you for any claim arising out of or relating to the Service is limited to the greater of (a) the amount you paid us for the Service in the twelve months preceding the event giving rise to the claim, or (b) 10,000 Japanese yen

These limits apply even if a remedy fails of its essential purpose and even if we have been advised of the possibility of damages.

Some jurisdictions do not allow the exclusion or limitation of certain damages; in those jurisdictions, our liability is limited to the smallest extent permitted by law.

13. Your indemnity to us

You agree to indemnify, defend, and hold harmless TeachLex and its operator against any claim, demand, loss, or expense (including reasonable legal fees) arising out of:

  • Your breach of these terms
  • Content you upload to the Service that infringes someone else's rights or breaks the law
  • Your misuse of AI outputs or integrity data in a way that harms another person
  • Your violation of any applicable law or your institution's policies in connection with the Service

14. Intellectual property

The TeachLex name, logo, marketing site, application interface, code, and documentation are owned by the operator and protected by copyright and other intellectual property laws. You may not copy, modify, or reuse them outside of what these terms permit.

You retain ownership of your own content as described in section 6.

15. Dispute resolution and governing law

These terms are governed by the laws of Japan, without regard to conflict-of-laws principles.

Before starting any legal action, you agree to contact us first at support@teachlex.com and to attempt to resolve the dispute informally for at least 30 days. Most disagreements are resolvable without lawyers; we would like to try that first.

If informal resolution does not work, disputes arising out of or relating to these terms or the Service will be resolved in the courts of Osaka, Japan, which you and we agree have exclusive jurisdiction.

This section does not prevent you from exercising any non-waivable rights you have under the consumer protection laws of your own country.

16. Changes to these terms

We may update these terms from time to time. When we do:

  • We will post the updated terms with a new "Last updated" date
  • For material changes, we will notify you by email at least 14 days before the change takes effect
  • We will summarize what changed at the top of the document

Continued use of TeachLex after the effective date means you accept the revised terms. If you don't, close your account before the effective date.

17. General

Entire agreement. These terms, together with the Privacy Policy, form the entire agreement between you and TeachLex regarding the Service, and supersede any prior agreements.

Severability. If any part of these terms is held unenforceable, the rest remains in effect.

No waiver. If we don't enforce a right, that is not a waiver of the right.

Assignment. You may not assign these terms without our consent. We may assign them in connection with a merger, acquisition, or sale of assets.

Contact. For anything related to these terms, email support@teachlex.com.

James Saunders-Wyndham Operator, TeachLex Osaka, Japan