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Free lessons

The exercises run in this page. We do not send your answers to a server, save them to an account or use them to assess you. Answers are held only in this page's memory. Clearing the practice or refreshing removes them; browser back/forward navigation may retain the page. Download or print your worksheet if you want a copy.

Use the fictional lesson cases. Do not enter customer records, personal details or confidential project information.

Hosting and external links

Cloudflare hosts this website and may process connection information, such as your IP address, to deliver and protect it. Read Cloudflare's privacy policy. Following a source link takes you to another organisation's website and its own policies.

Accounts and payments

This public release has no account registration, newsletter subscription, enquiry form or checkout. Those services will open only when their privacy notices, payment connection and operating arrangements are in place. No optional analytics or advertising scripts are included in this release.

Email contact

The operator is Richard Simmons, trading as BarrierNotes. If you email barriernotes@proton.me, your email address and message are processed to answer your enquiry. Proton provides the mailbox; read its privacy policy. Messages are retained as needed to handle the enquiry and applicable legal obligations. Do not send confidential records, identity documents or payment-card details. You can use the same email to ask about access, correction or deletion of your enquiry records; legally required transaction records may need to be retained.

Learning boundaries

Formative feedback is a learning aid. It is not a competence certificate, technical approval or a substitute for current standards and responsible professional review.