If Estonian is not the primary language of instruction in those Russian schools, I am curious to know the number and percentage of schools involved. Do they represent 5% , 25% (or other?) of the total number of schools in Estonia? What do their students' current Estonian language test scores look like? And how do these Estonian language test scores look in comparison to test scores from students who attend the French language or English language schools in Estonia? Of course, the language that the student uses at home needs to be factored into interpretation of the results.