Archipelago Learning, Inc.

Q: Mar 31 2012

FY: Dec 31 2011

FY: Dec 31 2011

Q: Sep 30 2011

Q: Jun 30 2011

Q: Mar 31 2011

FY: Dec 31 2010

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

FY: Dec 31 2009

Termination of a Material Definitive Agreement

Submission of Matters to a Vote of Security Holders

5.02,9.01

2.02,9.01

1.01,2.02,9.01

1.01,9.01

5.02,8.01

5.07

2.02,9.01

Entry into a Material Definitive Agreement

2.02,9.01

5.02,5.03,5.05,9.01

8.01,9.01

5.02,8.01,9.01

5.07

2.02,7.01,9.01

3.01

Results of Operations and Financial Condition

3.01,5.02,9.01

1.01,9.01

Certification of termination of registration of a class of securities (Section 12(b))

Post Effective Amendment to S-8

Notification of removal from listing and/or registration on a national securities exchange

06

Prospectus Supplement with Pricing Information

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Amended Initial Registration Statement

Free Writing Prospectus

Registration of Securities on Exchange

Notice of Effectiveness

Amended Initial Registration Statement

Free Writing Prospectus

Amended Initial Registration Statement

Amended Initial Registration Statement

Amended Initial Registration Statement

Amended Initial Registration Statement

Registration (IPO) statement under Securities Act of 1933

Additional Information for Proxy Statement/ Votes

No description available

No description available

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Tel Martijn

Orrick Ruth E

LeMaile-Stovall Troy

McEwen Tim

Hedrick Thomas F.

Babbrah Bhupinder

Regenbaum Donna

DUBROW MARK S

Hall Brian H

Chalmers Cameron

Muzzo David

BROWN BROTHERS HARRIMAN & CO

Tel Martijn

Hall Brian H

Orrick Ruth E

Regenbaum Donna

LeMaile-Stovall Troy

DUBROW MARK S

McEwen Tim

Babbrah Bhupinder

Correspondence with the SEC

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

No description available

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC