Classes and lessons are not currently creating racial biases in common culture, because these classes do not yet exist on a large scale.
However, we see references all throughout culture and media as black people being "the other", they are portrayed different than white people, they are portrayed as this out-group that is not part of the common goals of the nation, but rather of their own separate goals depending on the context of the media.
That should be confronted, analyzed, broken down, and countered. However, classes in schools that create more of the biases this media creates are not going to fix anything. Things need to be managed in a very careful and cautious way. Universities and other groups making these classes are not doing this, and in their hast to "educate" about how black people are treated they are making the situation worse.
I explain why policy should focus on making us think as a collective whole rather than focusing on teaching groups of the difficulties black people face. It is to reduce the biases that are the primary drivers of the hardships black people face.
Black people already know they face hardships. White people, however, are not innately aware of this, and often do need to learn through various means. However, when this is done in a classroom it results in people dismissing the issues black people face more not less.
The only way to accomplish this is to have natural exposure. To have a white person talk to and consider a black person as a friend, to have them as part of the same group/niche/culture, and have them communicate as peers. That doesn't happen when environments are set up to make white and black people feel more isolated and separated from one another.