Earlier quoted context omitted.
>"acting white" Honestly this is one of the biggest bullshit I've ever heard. Assuming that this mentality is quite widespread(not necessarily universal) among non White, then any attempt to introduce affirmative action or other equalizer practice would be futile. That kind of mentality must be purged hard from yesterday.
Teenage boys everywhere have a widespread bias against putting in the effort to get good grades. They might call it "gay" or "sissy" or "acting white" or whatever, but the root cause is usually their perception of what masculinity should look like. The men they look up to are anti-intellectual. This exists in all communities, race is not the main problem here.
"Everywhere" as in "across the world and across time", "because testosterone/teen boys will be boys"?
If so, then I can give you an emphatic no, this is not at all true. It is, as with 99% of things, a cultural phenomenon. The degree to which the "bias against putting in the effort to get good grades" exists varies enormously depending on subculture and time. You may have personally only experienced cultures where this is the dominant case, but that does not make it indicative of immutable nature.
If not, then where and when is your "everywhere"?