Class A Shares Prospectus | SDIT MONEY MARKET FUND | SDIT MONEY MARKET FUND - CLASS A

SDIT MONEY MARKET FUND

Investment Goal

Preserve principal value and maintain a high degree of liquidity while providing current income.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold Fund shares.

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class A Shares Prospectus SDIT MONEY MARKET FUND SDIT MONEY MARKET FUND - CLASS A
Management Fees	0.07%
Distribution (12b-1) Fees	none
Other Expenses	0.61%
Total Annual Fund Operating Expenses	0.68%

EXAMPLE

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class A Shares Prospectus SDIT MONEY MARKET FUND SDIT MONEY MARKET FUND - CLASS A	69	218	379	847

Principal Investment Strategies

The Money Market Fund is comprised of short-term U.S. dollar-denominated debt obligations that are rated in one of the two highest rating categories by Nationally Recognized Statistical Rating Organizations or that the sub-adviser (the Sub-Adviser) determines are of comparable quality. Under normal market conditions, the Fund invests in: (i) commercial paper and other short-term corporate obligations of U.S. and foreign issuers (including asset-backed securities) rated in the highest short-term rating category or that the Sub-Adviser determines are of comparable quality; (ii) certificates of deposit, time deposits, bankers' acceptances, bank notes, and other obligations of U.S. savings and loan and thrift institutions, U.S. commercial banks (including foreign branches of such banks) and foreign banks that meet certain asset requirements; (iii) short-term obligations issued by state and local governments; (iv) obligations of foreign governments (including Canadian and Provincial Government and Crown Agency obligations); and (v) U.S. Treasury obligations and obligations issued or guaranteed as to principal and interest by agencies or instrumentalities of the U.S. Government. The Fund may also enter into fully-collateralized repurchase agreements.

Using a top-down strategy and bottom-up security selection, the Sub-Adviser seeks securities with acceptable maturities (consistent with requirements of the Investment Company Act of 1940, as amended (the 1940 Act), for money market funds) that are marketable and liquid, offer competitive yields and are issued by issuers that are on a sound financial footing. Currently, the Fund invests only in first-tier securities. The Sub-Adviser also considers factors such as the anticipated level of interest rates and the maturity of individual securities relative to the maturity of the Fund as a whole. The Fund follows the 1940 Act rules about credit quality, maturity and diversification for money market funds. With respect to credit quality and maturity, the Fund's investment guidelines may be more restrictive than the 1940 Act rules applicable to money market funds.

Principal Risks

Asset-Backed Securities Risk — Payment of principal and interest on asset-backed securities is dependent largely on the cash flows generated by the assets backing the securities, and asset-backed securities may not have the benefit of any security interest in the related assets.

Corporate Fixed Income Securities Risk — Corporate fixed income securities respond to economic developments, especially changes in interest rates, as well as perceptions of the creditworthiness and business prospects of individual issuers.

Credit Risk — The risk that the issuer of a security or the counterparty to a contract will default or otherwise become unable to honor a financial obligation.

Extension Risk — The risk that rising interest rates may extend the duration of a fixed income security, typically reducing the security's value.

Fixed Income Market Risk — The prices of the Fund's fixed income securities respond to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments and their agencies. In the case of foreign securities, price fluctuations will reflect international economic and political events.

Foreign Issuer Risk — The risk that issuers in foreign countries face political and economic events unique to such countries. These events will not necessarily affect the U.S. economy or similar issuers located in the U.S.

Interest Rate Risk — The risk that the Fund's yield will decline due to falling interest rates. A rise in interest rates typically causes a fall in the value of fixed income securities in which the Fund invests, while a fall in interest rates typically causes a rise in the value of such securities. During periods when interest rates are low, the Fund's yield will also be low, and the income generated by the Fund may not be sufficient to offset all or a significant portion of the Fund's expenses, which could impair the Fund's ability to provide a positive yield and maintain a stable $1.00 share price.

Liquidity Risk — The risk that certain securities may be difficult or impossible to sell at the time and the price that the seller would like. The seller may have to lower the price, sell other securities instead or forego an investment opportunity, any of which could have a negative effect on Fund management or performance.

Market Risk — The risk that the market value of a security may move up and down, sometimes rapidly and unpredictably. Market risk may affect a single issuer, an industry, a sector or the bond market as a whole.

Opportunity Risk — The risk of missing out on an investment opportunity because the assets necessary to take advantage of it are tied up in other investments.

Prepayment Risk — The risk that, with declining interest rates, fixed income securities with stated interest rates may have the principal paid earlier than expected, requiring the Fund to invest the proceeds at generally lower interest rates.

Redemption Risk — The Fund may experience periods of heavy redemptions that could cause the Fund to liquidate its assets at inopportune times or at a loss or depressed value, particularly during periods of declining or illiquid markets. This could have a significant adverse effect on the Fund's ability to maintain a stable $1.00 share price, and, in extreme circumstances, could cause the Fund to suspend redemptions and liquidate completely.

U.S. Government Securities Risk — Although U.S. Government securities are considered to be among the safest investments, they are not guaranteed against price movements due to changing interest rates. Obligations issued by some U.S. Government agencies are backed by the U.S. Treasury, while others are backed solely by the ability of the agency to borrow from the U.S. Treasury or by the agency's own resources.

An investment in the Fund is not a bank deposit nor is it insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to maintain a constant price per share of $1.00, you may lose money by investing in the Fund.

Performance Information

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future.

Best Quarter: 1.33% (09/30/07)

Worst Quarter: 0.01% (09/30/11)

The Fund's Class A total return from January 1, 2013 to March 31, 2013 was 0.01%.

Average Annual Total Returns (for the periods ended December 31, 2012)

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Since Inception	Average Annual Returns, Inception Date
Class A Shares Prospectus SDIT MONEY MARKET FUND SDIT MONEY MARKET FUND - CLASS A	0.09%	0.68%	1.90%	4.60%	Nov. 15, 1983

Please call 1-800-DIAL-SEI to obtain the Fund's current 7-day yield.