Possible Clues:

• Federal cultural org
• Pro-school org.
• Agcy. with a 'Jazz Masters' award
• 'Read Across America' gp.
• Cultural grant giver: Abbr.
• Org. that funds PBS
• Labor union founded in 1857
• Union with 3+ million members, in brief
• Museum funder: Abbr.
• Org. supporting public schools