Exhibit 99.1

Attached are the correct CUSIP Numbers (“CUSIP”), International Securities Identification Numbers (“ISIN”) and European Common Codes for the SLM Student Loan Trust 2005-6, Student Loan-Backed Notes. The correct CUSIPs, ISINs and European Common Codes are as follows:

CUSIP Numbers:

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Class A-1 notes: 78442G PT 7

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Class A-2 notes: 78442G PU 4

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Class A-3 notes: 78442G PV 2

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Class A-4 notes: 78442G PW 0

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Class A-5A notes: 78442G PX 8

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Class A-5B notes: 78442G PZ 3

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Class A-6 notes: 78442G PY 6

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Class A-7 notes: 78442G QE 9

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Class B notes: 78442G QA 7

International Securities Identification Numbers (ISIN):

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Class A-1 notes: US78442GPT75

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Class A-2 notes: US78442GPU49

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Class A-3 notes: US78442GPV22

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Class A-4 notes: US78442GPW05

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Class A-5A notes: US78442GPX87

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Class A-5B notes: US78442GPZ36

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Class A-6 notes: US78442GPY60

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Class A-7 notes: US78442GQE97

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Class B notes: US78442GQA75

European Common Codes:

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Class A-1 notes: 022582232

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Class A-2 notes: 022582330

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Class A-3 notes: 022582356

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Class A-4 notes: 022582372

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Class A-5A notes: 022582429

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Class A-5B notes: 022582437

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Class A-6 notes: 022582453

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Class A-7 notes: 022582470

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Class B notes: 022582500

SLM Student Loan Trust 2005-6 8-K