TEEI Updates
She asked to learn Italian. We changed the rule.
An Afghan woman was waitlisted because of her nationality. She asked us to reconsider. TEEI Language is now open to Afghan women 18+, wherever they live.
TEEI Updates
Latest news, announcements, and updates from TEEI.
Latest Stories
TEEI Updates
The Educational Equality Institute is now TEEI
From today we go by TEEI: language practice, mentoring, skills training and a partner network on one engine we built ourselves. Nothing else changes.
TEEI Updates
How Project Galileo Protects TEEI’s Platforms
How TEEI keeps free language and career platforms online for Ukrainians affected by the war and women from Latin America and the Caribbean
TEEI Updates
How Evenhall Drafts Company Reports with the Vercel AI SDK
Streaming, tool-grounding and human approval: one sample company report, from volunteer hours to a shared link, drafted with the Vercel AI SDK.
TEEI Updates
When the Website Is Up but the Signup Flow Is Broken
For six days in August 2026, every new volunteer was turned away at the LinkedIn step while the site stayed up. How we tell a quiet door from a shut one.
TEEI Updates
DataCamp in TEEI's Programmes: A Thank You
Learners in TEEI's group study on DataCamp through DataCamp Donates. How the platform works, where it sits in TEEI's programmes, and our thanks.
TEEI Updates
Why We Keep libSQL Clients Inside Each Worker Request
A libSQL client shared across Worker requests hung requests in our test lane. We moved the cache into each request and kept reuse within it.
TEEI Updates
One Cron Owner, Still Duplicate Ticks
We schedule two products from one Worker. We guard individual jobs against duplicate effects and check their outcomes separately from tick delivery.
TEEI Updates
How We Compare Builds and Verify a Worker Release
We once used one measurement for both builds. We now take separate readings, verify the serving Worker version and assess rollback against the live schema.
TEEI Updates
Durable Object alarms: stale decisions, moving deadlines
After an external await, we could overwrite newer state. By moving a deadline, we kept old watches alive. We changed both rules and the tests.
TEEI Updates
Why our certificate repairs need a new R2 address
Until September 2026 a repair could overwrite badge images that readers had already cached as immutable. We publish every repair at a new address in R2.
TEEI Updates
How TEEI Runs Its Platforms on Cloudflare Workers
TEEI's website, TEEI Language, TEEI Mentorship and Evenhall run on Cloudflare Workers. This is how, with what broke and what we measured.
TEEI Updates
How TEEI Works: One Platform, Many Programmes
How TEEI works: one platform of shared blocks. A new programme starts on parts that already work, and each is there because research shows what it does.
TEEI Updates
Keeping Astro Content, Sitemaps and Search in Sync
We can read from one Astro collection and still disagree on what is published. For a built search index, we filter preview drafts out again.
TEEI Updates
Old Tabs, New Workers: A Guarded Reload
We traced a crash to old code reading new loader data, then found our tests expecting a failure report from a reload that worked.
TEEI Updates
Astro on Workers: the bugs between build and runtime
We found a 500 before a cache hit, private values in the Worker bundle and missing sitemap routes. Each exposed a boundary we had to migrate.
TEEI Updates
Pages to Workers: The Defaults We Had to Rebuild
We moved three apps from Pages to Workers, then changed Cloudflare accounts. We had to rebuild defaults for headers, redirects and deployment targets.
TEEI Updates
Two Workers, One React Router 8 App: Decide at the Boundary
We build two Workers from one React Router app, pass programme identity through typed context, and use stored rows for scheduled work.
TEEI Updates
How We Share One Session Lookup Across React Router Loaders
We found a session lookup in the language helper, outside our list of guards. We moved resolution into layout middleware and gave the context three states.
TEEI Updates
Building a Live Homepage with Astro and Cloudflare Workers
A local browser experiment found two ordering bugs in our activity line. We follow the handoffs between Astro, Workers and the visible text.
TEEI Updates
We Mask Country Pairs Before Storing Live Events
We omit names, coarsen times and mask country pairs before storage, then derive every public view from that record and remove its id at runtime.
TEEI Updates
Durable Objects for Rings, SQL for Outcomes
We had recorded the volunteer's answer, but still removed the learner from the lesson. Here is where live signals end and durable outcomes begin.
TEEI Updates
Why We Freeze Email Payloads on Cloudflare Queues
We could reuse an idempotency key and still change the payload after a deploy. We now store the first attempt’s message fields so a retry can reuse them.
TEEI Updates
Astro Server Islands: Cache Age Is Not Data Age
We keep Astro pages static while handling old measurements, failed source reads and island requests that never replace the fallback.
TEEI Updates
One Nonce, Two Inputs: Fixing React Router Streaming
We restored loader data with one nonce input. For late Suspense content, we needed the same nonce in another place.
TEEI Updates
How We Join React Router Errors Across Browser and Worker
We can capture an error and still struggle to follow the failure. We compare a shared trace with a request ID across browser and Worker.
TEEI Updates
Typed Pings and Failure as Data in React Router
We refresh one unread count without rerunning the page's loaders. To keep the page after a rejected background panel load, we return failure as data.
TEEI Updates
Why We Still Handle WebSockets Before Astro
We keep WebSocket upgrades outside Astro as a precaution. Locally, a copied response kept its socket; a rebuild without the socket broke the upgrade.
TEEI Updates
Why We Broke a React Router Build With an Unused Export
We can fail a React Router build on code we would never send to the browser: we check imports before we drop unused code. How we split our files.
TEEI Updates
Cloudflare Workers: Shorter Trips, Fewer Trips
We run Workers near our database to shorten trips, and batch reads and rewrite loaders to remove them: 84 trips to six on a development server.
TEEI Updates
We Pruned 12,115 Astro Redirect Pages from Our Build
Pruning Astro fallback pages reduced the files we shipped. Redirecting their old URLs needed a separate fix before the Worker.
TEEI Updates
Worker First Is Not Middleware First: Astro on Cloudflare
In our Astro setup, we got 404s for old image URLs. We trace why we needed redirects before the adapter, even with Worker first.
TEEI Updates
What We Bypass with Cloudflare Service Bindings
We moved a failing call onto a service binding and it kept failing. Weeks later we found that our RPC calls could write through a maintenance pause.
TEEI Updates
Counting to 128 Before We Add One Worker Secret
We count built variables before a deploy and deployed variables before a secret write, adding the live secret inventory in both cases.
TEEI Updates
What TEEI Runs on AWS
The AWS services that carry TEEI's free programmes, measured: Chime video, Bedrock checks and who decides, monitoring, and how releases are verified.
TEEI Updates
How TEEI Turns Amazon Chime SDK Events into Verified Hours
TEEI's free programmes run on Amazon Chime SDK, and every verified volunteer hour, up to the company report in Evenhall, starts as a meeting event.
TEEI Updates
How Algolia Powers Multilingual Search at TEEI
With support from Algolia for Open Source, TEEI helps people find help answers and job titles in four languages, even when the spelling is imperfect.
TEEI Updates
Ukrainian Learners Pass 75,000 Hours on DataCamp
Learners in TEEI Skills Academy have passed 75,000 hours on DataCamp. The dashboard read 76,032 on 21 September 2026. Every seat is free.