A conservative-led Missouri school board has voted to drop elective courses on Black history and literature, five months after the same board rescinded an anti-discrimination policy adopted in the aftermath of the killing of George Floyd. The Francis Howell School Board voted 5-2 Thursday night to stop offering Black History and Black Literature, courses that had been offered at the district’s three high schools since 2021. A little over 100 students took the courses this semester in the predominantly white suburban area of St. Louis. In July, the board revoked an anti-racism resolution and or…