The differences can be striking.. I was an Air Force brat so I got to see the differences. My first school was Beavercreek Elementary in Dayton Ohio... at the time the only minority students were a set of Chinese twin girls. Total white-bread suburbia.. I was less than average, held back first grade because a goof off. Then I was at Armstrong Elementary, Hampton VA, about 50/50 ratio white to black. I was rated at a 12th grade reading level in 2nd grade and was relegated to a teachers helper role as I was just about the only other one that could read well. I never bought the idea that blacks are less intelligent than whites as a group... I’m more inclined to believe that apathy is the cause of the differences... they have a cultural propensity to not value formal education.
All one needs to do to confirm this is to look at when a society/country/continent established schools and universities.
These pre-date the trans-atlantic slave trade (which also includes black African's being involved, typically kidnapping and selling other tribes' people)...so "white oppression" or "white supremacy" on the African continent can't be used as a valid excuse as to why they didn't build and maintain universities or similar institutions of learning across the African continent.
List of oldest schools
First overall...in England - The King's School, Canterbury, England (597)
Then Switzerland - Flade [de], St. Gallen, Switzerland (ending 7th century, exact date not clear), founded by Saint Othmar
Germany - Willibald-Gymnasium [de], Eichstätt, Germany (c. 740), founded by Willibald
And so on...
https://en.wikipedia.org/wiki/List_of_oldest_schools
List of medieval universities
1088 - University of Bologna - Kingdom of Italy (Holy Roman Empire) - Bologna, Italy - "The first university in the sense of a higher-learning, degree-awarding institute, the word universitas having been coined at its foundation"
Several other European Countries named.
Nothing in Africa.
https://en.wikipedia.org/wiki/List_of_medieval_universities
List of oldest universities in continuous operation
1088 University of Bologna - Italy
1096 University of Oxford - England
...
1909 French Algeria (Algiers) - University of Algiers
https://en.wikipedia.org/wiki/List_of_oldest_universities_in_continuous_operation
The oldest University on the African continent, circa 1337 was the University of Timbuktu. It was actually the combination of 3 mosques...naturally, run by muslims teaching islam. It ceases to exist after 1591.
University of Timbuktu
https://www.studysmarter.co.uk/explanations/history/modern-world-history/university-of-timbuktu/