Tools in This Collection
US Presidents Reference
All 47 presidents with terms, parties, vice presidents, and key events
Constitution Amendments Reference
All 27 amendments with ratification year, plain-English explanation, and context
Declaration of Independence Reference
Full annotated text with signer biographies and section-by-section context
Guides & Articles
Primary Source American History Reference
US history is one of the most studied subjects in American schools, but finding accurate, well-organized reference information can require navigating multiple sources. These three tools consolidate the most commonly needed US history reference data — who the presidents were and when they served, what the constitutional amendments say and why they were passed, and what the Declaration of Independence actually states — in a single, searchable, educational format.
US Presidents: All 47 From Washington to the Present
The US Presidents Reference covers all 47 presidents with key facts for each: full name, birth and death dates, home state, party affiliation, term dates, vice presidents, and notable events or achievements from their presidency. The tool is sortable and searchable — find the president who served during World War I (Woodrow Wilson, 28th, 1913-1921), or see all presidents who died in office (William Henry Harrison, Zachary Taylor, Abraham Lincoln, James Garfield, William McKinley, Warren G. Harding, Franklin D. Roosevelt, John F. Kennedy).
The reference is useful for trivia, academic research, and settling the kind of questions that come up in conversation: which president served the shortest term? (Harrison — 31 days). Which served the longest? (FDR — 12 years across four terms). Which presidents were never elected to the office? (Gerald Ford, who became president when Nixon resigned). Which were assassinated? (Lincoln, Garfield, McKinley, Kennedy). The tool puts all of this at your fingertips without Wikipedia navigation.
Constitutional Amendments: From the Bill of Rights to Today
The US Constitution has been amended 27 times since its ratification in 1788. The first ten amendments — the Bill of Rights — were added in 1791 and collectively protect freedom of speech, religion, and the press (First), the right to bear arms (Second), protection against unreasonable search and seizure (Fourth), the right to a jury trial and protection against self-incrimination (Fifth and Sixth), and protection against cruel and unusual punishment (Eighth). The Constitution Amendments Reference covers all 27 amendments with the year ratified, the vote count in Congress and states, a plain-English explanation, and historical context explaining why the amendment was passed.
Notable later amendments include the 13th (1865, abolishing slavery), 14th (1868, birthright citizenship and equal protection), 15th (1870, voting rights regardless of race), 19th (1920, women's suffrage), 22nd (1951, two-term presidential limit), 24th (1964, banning poll taxes), and 26th (1971, lowering the voting age to 18). The 27th Amendment, ratified in 1992, actually originated in 1789 alongside the Bill of Rights — it prohibits Congress from changing its own pay during the current term.
The Declaration of Independence: The Founding Document
The Declaration of Independence is one of the most studied documents in American history, but many people are familiar only with the opening passages. The Declaration of Independence Reference provides the complete annotated text with three components: the philosophical preamble, the list of grievances against King George III (the longest section, listing 27 specific complaints), and the actual declaration of independence. Each section includes historical context explaining what specific events or policies the founders were responding to. The signer biographies section covers all 56 signatories — their backgrounds, professions, states, and fates after signing (several faced significant hardship for their role in the Revolution).
Frequently Asked Questions
Who was the first US president?
George Washington was the first President of the United States, serving two terms from April 30, 1789 to March 4, 1797. He was unanimously elected by the Electoral College both times he ran. Washington's voluntary retirement after two terms established the precedent of a two-term limit that held until FDR's four terms — after which it was codified by the 22nd Amendment in 1951.
How many amendments does the US Constitution have?
The US Constitution has 27 amendments. The first 10, known collectively as the Bill of Rights, were ratified on December 15, 1791. The most recent, the 27th Amendment, was ratified on May 7, 1992 — though it was originally proposed in 1789. It prohibits Congress from giving itself a pay raise that takes effect before the next election.
Which US presidents were assassinated?
Four US presidents were assassinated: Abraham Lincoln (April 14, 1865, by John Wilkes Booth), James Garfield (September 19, 1881, by Charles J. Guiteau), William McKinley (September 14, 1901, by Leon Czolgosz), and John F. Kennedy (November 22, 1963, by Lee Harvey Oswald according to the Warren Commission).
What are the first 10 amendments to the Constitution?
The Bill of Rights (1791): 1st — freedom of speech, religion, press, assembly, and petition. 2nd — right to bear arms. 3rd — no quartering of soldiers. 4th — protection against unreasonable search and seizure. 5th — due process, no self-incrimination. 6th — right to jury trial. 7th — right to jury in civil cases. 8th — no cruel and unusual punishment. 9th — rights not enumerated are retained by the people. 10th — powers not delegated to the federal government are reserved to states or the people.
Who wrote the Declaration of Independence?
Thomas Jefferson was the primary author of the Declaration of Independence, drafted in June-July 1776. He worked with a Committee of Five: Benjamin Franklin, John Adams, Roger Sherman, and Robert Livingston reviewed and suggested revisions to Jefferson's draft. The Continental Congress adopted the Declaration on July 4, 1776, and it was signed by 56 delegates from the thirteen colonies.