From Googling, I get the impression that at present, Russian-speakers in Latvia can send their children to tax-funded public schools where they spend the entire day learning all their lessons IN RUSSIAN, not Latvian.
Since ~2005 official policy is to have 60% of lessons in Latvian and 40% in Russian.
Tax-funded higher education is available in Latvian only (and English for foreign exchange students).
And this approach is working - knowledge of Latvian is increasing each year...