800 accounts, one afternoon at Pascal School

When TenGo started, we were a group of tenth-graders who had just built a learning platform and were proud of it in the way only people who have never yet tried to give it to someone else can be. The number we kept talking about was the users on avab.vn. It took us a while to ask a harder question: who still couldn't reach it?

On 28 August 2026, I walked into Pascal Primary and Secondary School in Bắc Từ Liêm, Hanoi, with the rest of the TenGo team. We weren't there to pitch anything. We donated 800 student accounts — full access to every maths course on avab.vn — and handed the teachers the tools to assign homework, collect submissions and track their students' progress online. The handover took one afternoon. Principal Nguyễn Tú Anh signed the certificate a week later. But the moment I remember most clearly is simpler than any of that: watching a teacher open the platform for the first time and immediately start looking for a topic she could use that week.

Eight hundred accounts sounds like a big number until you realise it just means 800 children who can now open avab.vn and find a maths problem waiting for them. That is not a revolution. It is a small, specific thing — and I have come to believe that small specific things are the only kind that actually happen. A platform no one can access is just code on a server. Handing it to a school makes it real.

TenGo built avab.vn because we wanted to learn by building. That was the honest reason. What I didn't expect is that building something other people actually use would teach me more than building it for myself ever did. The Pascal visit was the clearest proof of that so far. I came home, opened my laptop and kept working — not to add more features, but because for the first time I truly understood what the features were for.