It has always been my experience that when being taught history, we remember the things that interest us. I could not, for instance, name any 2 successive reigning monarchs of the UK. Nor could i name more than a handful of particular battles that took place during the Crimean War. However, i did get a GCSE 'A' pass on the subject of the assassination of JFK.
Anyone not interested in history, black or British, will not be seeking to be further educated in these subjects.