SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G/A*

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO 13d-2(b)

(Amendment No. 1)

National American University Holdings, Inc.

  (Name of Issuer)

    (Title of Class of Securities)

(CUSIP Number)

     (Date of event which requires filing of this statement)

Check the appropriate box to designate the rule pursuant to which this Schedule 13G/A is filed:

o

Rule 13d-1(b)

x

Rule 13d-1(c)

o

Rule 13d-1(d)

(Page 1 of 7 Pages)

1

NAMES OF REPORTING PERSONS

I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

Arrowgrass Capital Partners (US) LP

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**

(a) x

(b) o

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH

5

SOLE VOTING POWER

0

6

SHARED VOTING POWER

0

7

SOLE DISPOSITIVE POWER

0

8

SHARED DISPOSITIVE POWER

0

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

0

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES**

o

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0.0%

12

TYPE OF REPORTING PERSON**

PN

1

NAMES OF REPORTING PERSONS

I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

Arrowgrass Capital Services (US) Inc.

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**

(a) x

(b) o

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH

5

SOLE VOTING POWER

0

6

SHARED VOTING POWER

0

7

SOLE DISPOSITIVE POWER

0

8

SHARED DISPOSITIVE POWER

0

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

0

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES**

o

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0.0%

12

TYPE OF REPORTING PERSON**

CO

Item 1(a).

NAME OF ISSUER.

The name of the issuer is National American University Holdings, Inc. (formerly known as Camden Learning Corp.) (the "Company").

Item 1(b).

ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

The Company's principal executive offices are located at 5301 S. Highway 16, Suite 200, Rapid City, SD 57701.

Item 2(a).

NAME OF PERSON FILING:

(i)

Arrowgrass Capital Partners (US) LP, a Delaware limited partnership ("ACP"), with respect to the shares of   Common Stock directly owned by it; and

(ii)

Arrowgrass Capital Services (US) Inc., a Delaware corporation ("ACS"), with respect to the shares of Common Stock directly owned by ACP.

Item 2(b).

ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:

Item 2(c).

CITIZENSHIP:

Item 2(d).

TITLE OF CLASS OF SECURITIES:

Common Stock, par value $.0001 per share (the "Common Stock").

Item 2(e).

CUSIP NUMBER:

132863101

Item 3.

IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b) OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

(a)

o

Broker or dealer registered under Section 15 of the Act,

(b)

o

Bank as defined in Section 3(a)(6) of the Act,

(c)

o

Insurance Company as defined in Section 3(a)(19) of the Act,

(d)

o

Investment Company registered under Section 8 of the Investment Company Act of 1940,

(e)

o

Investment Adviser registered under Section 203 of the Investment Advisers Act of 1940,

(f)

o

Employee Benefit Plan or Endowment Fund in accordance with 13d-1(b)(1)(ii)(F),

(g)

o

Parent Holding Company or control person in accordance with Rule 13d-1(b)(ii)(G),

(h)

o

Savings Association as defined in Section 3(b) of the Federal Deposit Insurance Act,

(i)

o

Church Plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940,

(j)

o

Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

Item 4.

OWNERSHIP.

A.

Arrowgrass Capital Partners (US) LP

(a)

Amount beneficially owned: -0-

(b)

Percent of class: 0.0%

As of December 8, 2009, the Reporting Persons liquidated their position in the Common Stock.

(c)

(i)

Sole power to vote or direct the vote: -0-

(ii)

Shared power to vote or direct the vote: -0-

(iii)

Sole power to dispose or direct the disposition: -0-

(iv)

Shared power to dispose or direct the disposition of: -0-

B.

Arrowgrass Capital Services (US) Inc.

(a)

Amount beneficially owned: -0-

(b)

Percent of class: 0.0%

(c)

(i)

Sole power to vote or direct the vote: -0-

(ii)

Shared power to vote or direct the vote: -0-

(iii)

Sole power to dispose or direct the disposition: -0-

(iv)

Shared power to dispose or direct the disposition: -0-

Item 5.

OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

If this statement is being filed to report the fact as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following x.

Item 6.

OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

Not applicable.

Item 7.

IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.

Not applicable.

Item 8.

IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

Not applicable.

Item 9.

NOTICE OF DISSOLUTION OF GROUP.

Not applicable.

Item 10.

CERTIFICATION.

Arrowgrass Capital Partners (US) LP

By: Arrowgrass Capital Services (US) Inc.,
its General Partner

Name: Sean Flynn

Title:   Director

Arrowgrass Capital Services (US) Inc.

Name: Sean Flynn

Title:   Director