Throughout American history, discriminatory voting practices have been used to systemically disenfranchise Black Americans and prevent them from fully exercising their right to vote. Some of the most significant discriminatory voting practices in Black history include:

1. Poll taxes: Poll taxes were fees that individuals had to pay in order to vote. These taxes disproportionately affected Black voters, who were often unable to afford the fee. Poll taxes were used in many Southern states to prevent Black Americans from voting and were not abolished until the passage of the 24th Amendment in 1964.

2. Literacy tests: Literacy tests were often used as a way to disenfranchise Black voters by requiring them to pass a test on their reading and writing abilities before being allowed to vote. These tests were subjective, arbitrary, and unfairly administered, making it difficult for many Black Americans to pass and exercise their right to vote.

3. Grandfather clauses: Grandfather clauses were laws that exempted individuals from voting restrictions if their grandfathers had been eligible to vote before the Civil War. Since most Black Americans' ancestors were enslaved and therefore ineligible to vote prior to the Civil War, grandfather clauses effectively excluded them from voting.

4. Intimidation and violence: Black voters have long faced intimidation and violence at the polls, particularly in the Jim Crow South. Tactics such as threats, physical violence, and even lynchings were used to discourage Black Americans from voting and to maintain white supremacy.

5. Gerrymandering: Gerrymandering is the manipulation of electoral district boundaries to favor one political party over another. In many instances, gerrymandering has been used to dilute the voting power of Black communities by packing them into a small number of districts or splitting them across multiple districts, effectively minimizing their impact on elections.

These discriminatory voting practices have had a lasting impact on Black political participation and representation in the United States. Despite the progress that has been made to protect voting rights, ongoing challenges such as voter suppression, voter ID laws, and limitations on early voting continue to disproportionately impact Black voters and undermine the principles of democracy.