Black History Month Crossword

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Across
  1. 3. 15th African American woman to get a PhD in mathematcs
  2. 6. First Sfrican American to get a PhD in mathematics
  3. 8. Fourth African-American to get a PhD in mathematics
  4. 9. First African-American college professor
Down
  1. 1. Served as the chair of the Clark College Mathematics department
  2. 2. 9th African American to get a PhD in mathematics
  3. 4. Mathematician and aerospace engineer who helped to understand sonic booms
  4. 5. Second African-American to earn a PhD in mathematics
  5. 6. Nuclear Scientist and mathematician
  6. 7. African-American mathematician and aerospace engineer