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TEEI BLOG

Blog posts, page 2

News and perspectives from TEEI's programmes.

Field reports from corporate volunteering programmes, mentorship cohorts in Ukraine, and the measurable outcomes that prove this model works.

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Dark band with the TEEI and Cloudflare Project Galileo marks, the headline Project Galileo protects more than our website, and the line For Ukrainians affected by the war and women from Latin America. Below it, four phone screens: a TEEI Language lobby before a conversation, the Skills Academy Discover page with an expert Q&A, a TEEI Mentorship request waiting for an answer, and the Evenhall Impact page with sample data.

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 Team

Five stages of one company report in Evenhall: hours recorded, the data block, the AI draft written with the Vercel AI SDK, review and approval by the manager, and the finished report shared.

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 Team

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 Team

A learner in TEEI's DataCamp group speaks to the camera. Beside him is the title, with Skills Academy, TEEI Language and TEEI Mentorship.

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 Team

Two sequences in one Worker isolate: one shared database client per URL at module scope, and one client map per request

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 Team

Diagram of two Workers: one owns the cron schedule, and the Skills Academy jobs run beside their data through a service binding

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 Team

Diagram of one commit built twice, for staging and production, with both builds compared input by input against the declared differences

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 Team

Diagram in two rows of four steps: a Durable Object alarm and a concurrent request, before and after the alarm stopped writing back a stale copy

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 Team

Diagram of two generations in Cloudflare R2: a repair writes generation 2 beside generation 1, which is left as it was, and the verification page points to generation 2, the one that is ready

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 Team

Dark band with the TEEI and ElevenLabs marks, the headline Real-life conversations, rehearsed out loud, and the line Both rooms use ElevenLabs, in two different ways. Beside it, two Practice Companion phone screens: the Say it room in the scenario The doctor, mid-conversation with a clinic receptionist and a You could say prompt, labelled Say it, live, and the Listen room in Calling the clinic, with a recorded caller and the first comprehension question, labelled Listen, recorded once.

TEEI Learning

How Practice Companion Uses ElevenLabs

How we run Say it live on the ElevenLabs Speech Engine, with our own rules deciding each reply, and voice each Listen dialogue once for streaming from R2.

TEEI Team