The text and some explanation of Amendments #11-27 of the U.S. Constitution.
XII: Electoral College.
XIII: Abolition of slavery.
XIV: Citizenship; state action; privileges or immunities; due process clause; equal protection; appointment of representatives; disqualification for rebellion; debits incurred during rebellion; enforcement clause.
XV: Suffrage; race.
XVI: Income tax.
XXII: Presidential term limit.
XXIV: Poll taxes.
XXVII: Congressional compensation.
For the full text and further explanation of the entire U.S. Constitution-the Preamble, the Articles of Confederation, and the 27 Amendments-go to any of the following reliable sources:
USConstitution.net (including explanation for kids and teenagers).