Exhibit 1

Agreement of Joint Filing

Pursuant to Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, the undersigned persons hereby agree to file with the Securities and Exchange Commission the Statement on Schedule 13G, as amended (the “Statement”), to which this Agreement is attached as an exhibit, including any amendments thereto, and agree that such Statement, including any amendments thereto, as so filed, is filed on behalf of each of them.

IN WITNESS WHEREOF, the undersigned have executed this Agreement.

Dated: March 12, 2012

Camden Partners Strategic Fund II-A, L.P.

By: Camden Partners Strategic II, LLC, its general partner

/s/ Donald W. Hughes

Name: Donald W. Hughes

Title: Managing Member

Camden Partners Strategic Fund II-B, L.P.

By: Camden Partners Strategic II, LLC, its general partner

/s/ Donald W. Hughes

Name: Donald W. Hughes

Title: Managing Member

Camden Partners Holdings, LLC

/s/ Donald W. Hughes

Name: Donald W. Hughes

Title: Chief Financial Officer

Camden Partners Strategic II, LLC

/s/ Donald W. Hughes

Name: Donald W. Hughes

Title: Managing Member

Richard M. Berkeley

/s/ Donald W. Hughes, Attorney-in-Fact

Donald W. Hughes

/s/ Donald W. Hughes

David L. Warnock

/s/ Donald W. Hughes, Attorney-in-Fact

CAMDEN PARTNERS STRATEGIC II LLC SC 13G/A