Education. I think there's no good reason why only elite schools have access to great lecturers and great materials. Great lectures with great contents should be recorded once and be made digitally accessible to all schools. Teachers should be focusing on student developments at personal level instead of reinventing the wheels of preparing for lectures!

I was working on this as a startup, we did have some good results, but the challenge was to take it at a bigger scale. Unfortunately underserved schools/parents just don't have the spending priority nor the awareness on how important great education is, making it hard to make a profitable startup out of the idea. My next direction is to take it as a non-profit organization, and so I'm striving to start a different business which I can live off and hopefully cross-subsidy this non-profit idea. My journey is still long way to go :(