George Washington measured land , air space and water . Current U.S. President Barack Obama had several jobs before being elected as the first African-American president in 2008 . John Adams taught for a few years and became a lawyer . Thomas Jefferson was the first president to have an office in the White House ( he had one at his home ).
George Washington measured land , air space and water . John Adams taught for a few years and became a lawyer . Thomas Jefferson was the first president to have an office in the White House ( he had one at his home ).