Critical race theory
In other words, institutionalized racism is when the society is set up to help some people more than others and hurt some people more than others and it isn't always easy to see this happening.  With institutionalized racism, a white person does not need to do anything racist to a non-white person.  The rules of the society do it for them.  For example, the schools in white neighborhoods might have more and newer computers than the schools in black neighborhoods, which means the white schoolchildren will get better grades even if the black schoolchildren work just as hard.  The people at the white school might not know that the people at the black school have worse computers.  In English, we say this as, "this is not a level playing field."