Rig: "The article didn't mention those elements of education reversals because it was written to concentrate on the issue of how immigration affects education. You're right about those things, of course, but correcting them is hampered by a continual influx of uneducated immigrants who don't speak the primary language."

The article didn't just "focus" on the illegal immigration issue, it singled that out as the major cause.

BTW, Canada is officially bilingual and has a whole province where English is not the primary language.   Plus both Canada and the US have millions of legal immigrants whose English (and/or French) is minimal or virtually nonexistent when they take up residency here. They may speak only Russian, Viet Namese, Mandarin, or some other language, and many of them manage to run or work for businesses pretty successfully in spite of that - as do many people who are fluent only in Spanish.

Kids in Europe often grow up speaking and understanding several different languages, yet they generally have higher academic achievement than US kids do in recent years.