SLM Corporation
Medium Term Notes, Series B

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With Maturities of 9 Months or More from Date of Issue

Registration No. 333-107132
Filed Pursuant to Rule 424(b)(3)
       
Pricing Supplement No. 453
(To Prospectus dated January 5, 2005 and
Prospectus Supplement dated January 5, 2005)
  Trade Date: 7/25/2005
Issue Date: 7/28/2005
   

The date of this Pricing Supplement is 7/25/2005

 
   
   
   
   
  Interest Payment

   
  Subject to Redemption

   
   
   
 
  Stated Interest Rate Per Annum(1)
   
   
   
   
   
   
   
CUSIP
  Maturity Date
  Price to Public(2)(3)
  Discounts & Commissions
  Frequency
  First Payment
  Survivor's Option
  Yes/No
  Date and terms of redemption
  Aggregate Principal Amount
  Net Proceeds
  OID Status
78490FUY3   N/A   09/15/2010   100%   0.750%   Quarterly(4)   09/15/05   No   No       612,000   607,410.00   N
                                                 
Floating Rate Index
  Spread
  Reset Period(4)
  Accrual Method
  Maximum Interest Rate
  Minimum Interest Rate
   
91 Day T-Bill   0.400%   Weekly   Actual/Actual (Payment Basis)   N/A   N/A    

Effective June 30, 2005, Bear, Stearns & Co. Inc. was added as a selling agent under the SLM EdNotes program.

(1)
The interest rates on the Ed Notes may be changed by SLM Corporation from time to time, but any such change will not affect the interest rate on any Ed Notes offered prior to the effective date of the change.

(2)
Expressed as a percentage of aggregate principal amount.

(3)
See "Supplemental Plan of Distribution" in the Prospectus supplement for additional information concerning price to public and underwriting compensation.

(4)
On the Interest Reset Date, which is the day after the 3 month T Bill auction, the Calculation Agent will establish the new rate based on the BEY for the 3 month T Bill auction published in H.15 (http://www.publicdebt.treas.gov/of/ofrespr.htm). In the event that the results of the 91 day Treasury Bill auction ceases to be published or reported, or that no auction is held in a particular week, then the rate in effect as a result of the last such report will remain in effect until such time, as the results of auctions of 91 day Treasury Bills will again be published.