DFA International Real Estate Securities Portfolio

SHARE CLASS (TICKER): INSTITUTIONAL CLASS (DFITX)

Summary Prospectus

July 21, 2015

Before you invest, you may want to review the Portfolio’s Prospectus, which contains more information about the Portfolio and its risks. You can find the Portfolio’s Prospectus and other information about the Portfolio, including the Statement of Additional Information (SAI) and most recent reports to shareholders, when available, online at http://us.dimensional.com/other/prospectuses. You can also get this information at no cost by calling collect to (512) 306-7400 or by sending an e-mail request to document_requests@dimensional.com. The Portfolio’s Prospectus and SAI, both dated February 28, 2015, as may be supplemented, are incorporated by reference into this Summary Prospectus.

Investment Objective

The investment objective of the DFA International Real Estate Securities Portfolio is to achieve long-term capital appreciation.

Fees and Expenses of the Portfolio

This table describes the fees and expenses you may pay if you buy and hold shares of the DFA International Real Estate Securities Portfolio.

Shareholder Fees (fees paid directly from your investment): None

Annual Fund Operating Expenses (expenses that you pay each

year as a percentage of the value of your investment)*

Management Fee	0.25%
Other Expenses	0.03%
Total Annual Fund Operating Expenses	0.28%

* The “Management Fee” and “Total Annual Fund Operating Expenses” have been adjusted to reflect the decrease in the management fee payable by the Portfolio from 0.35% to 0.25% and an amendment to the Fee Waiver and Expense Assumption Agreement effective as of February 28, 2015.

EXAMPLE

This Example is meant to help you compare the cost of investing in the DFA International Real Estate Securities Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio 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 Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 YEAR		3 YEARS		5 YEARS		10 YEARS
	$29		$90		$157		$356

PORTFOLIO TURNOVER

The DFA International Real Estate Securities Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the DFA International Real Estate Securities Portfolio’s performance. During the most recent fiscal year, the DFA International Real Estate Securities Portfolio’s portfolio turnover rate was 1% of the average value of its investment portfolio.

2    Dimensional Fund Advisors

Principal Investment Strategies

The DFA International Real Estate Securities Portfolio, using a market capitalization weighted approach, purchases a broad and diverse set of securities of non-U.S. companies principally engaged in the real estate industry, including developed and emerging markets, with a particular focus on non-U.S. real estate investment trusts (“REITs”) and companies Dimensional Fund Advisors LP (the “Advisor”) considers to be REIT-like entities. A company’s market capitalization is the number of its shares outstanding times its price per share. In general, the higher the relative market capitalization of a real estate company within an eligible country, the greater its representation in the Portfolio. The Advisor may modify market capitalization weights and even exclude companies after considering such factors as free float, momentum, trading strategies, liquidity management, and profitability, as well as other factors that the Advisor determines to be appropriate, given market conditions. In assessing profitability, the Advisor may consider different ratios, such as that of earnings or profits from operations relative to book value or assets. The Advisor also may limit or fix the Portfolio’s exposure to a particular country or issuer.

The Portfolio considers a company to be principally engaged in the real estate industry if the company’s principal activities include ownership, management, development, construction, or sale of residential, commercial or industrial real estate. REIT and REIT-like entities are types of real estate companies that pool investors’ funds for investment primarily in income producing real estate or real estate related loans or interests.

The DFA International Real Estate Securities Portfolio intends to purchase securities of companies associated with developed and emerging markets countries that the Advisor has designated as approved markets for investment. As a non-fundamental policy, under normal circumstances, at least 80% of the Portfolio’s net assets will be invested in securities of companies in the real estate industry. The DFA International Real Estate Securities Portfolio generally considers a company to be principally engaged in the real estate industry if the company (i) derives at least 50% of its revenue or profits from the ownership, management, development, construction, or sale of residential, commercial, industrial, or other real estate; (ii) has at least 50% of the value of its assets invested in residential, commercial, industrial, or other real estate; or (iii) is organized as a REIT or REIT-like entity. The Portfolio also may invest in stapled securities, where one or more of the underlying securities represents interests in a company or subsidiary in the real estate industry.

The DFA International Real Estate Securities Portfolio may gain exposure to companies associated with approved markets by purchasing equity securities in the form of depositary receipts, which may be listed or traded outside the issuers domicile country. The DFA International Real Estate Securities Portfolio is authorized to use derivatives, such as futures contracts and options on futures contracts for equity securities and indices, to adjust market exposure based on actual or expected cash inflows to or outflows from the Portfolio. The Portfolio does not intend to use derivatives for purposes of speculation or leveraging investment returns.

DFA International Real Estate Securities Portfolio Summary Prospectus    3

The DFA International Real Estate Securities Portfolio may lend its portfolio securities to generate additional income.

Principal Risks

Market Risk: Even a long-term investment approach cannot guarantee a profit. Economic, political, and issuer-specific events will cause the value of securities, and the DFA International Real Estate Securities Portfolio that owns them, to rise or fall. Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money.

Foreign Securities and Currencies Risk: Foreign securities prices may decline or fluctuate because of: (a) economic or political actions of foreign governments, and/or (b) less regulated or liquid securities markets. Investors holding these securities may also be exposed to foreign currency risk (the possibility that foreign currency will fluctuate in value against the U.S. dollar or that a foreign government will convert, or be forced to convert, its currency to another currency, changing its value against the U.S. dollar). The DFA International Real Estate Securities Portfolio does not hedge foreign currency risk.

Small Company Risk: Securities of small companies are often less liquid than those of large companies and this could make it difficult to sell a small company security at a desired time or price. As a result, small company stocks may fluctuate relatively more in price. In general, smaller capitalization companies are also more vulnerable than larger companies to adverse business or economic developments and they may have more limited resources.

Risks of Concentrating in the Real Estate Industry: The DFA International Real Estate Securities Portfolio is concentrated in the real estate industry. The exclusive focus by the DFA International Real Estate Securities Portfolio on the real estate industry will cause the Portfolio to be exposed to the general risks of direct real estate ownership. The value of securities in the real estate industry can be affected by changes in real estate values and rental income, property taxes, and tax and regulatory requirements. Also, the value of securities in the real estate industry may decline with changes in interest rates. Investing in REITs and REIT-like entities involves certain unique risks in addition to those risks associated with investing in the real estate industry in general. REITs and REIT-like entities are dependent upon management skill, may not be diversified, and are subject to heavy cash flow dependency and self-liquidation. REITs and REIT-like entities also are subject to the possibility of failing to qualify for tax free pass-through of income. Also, many foreign REIT-like entities are deemed for tax purposes as passive foreign investment companies (PFICs), which could result in the receipt of taxable dividends to shareholders at an unfavorable tax rate. Also, because REITs and REIT-like entities typically are invested in a limited number of projects or in a particular market segment, these entities are more susceptible to adverse developments affecting a single project or market segment than more broadly diversified investments. The performance of the DFA International Real Estate Securities Portfolio may be materially different from the broad equity market.

4    Dimensional Fund Advisors

Emerging Markets Risk: Numerous emerging market countries have a history of, and continue to experience serious, and potentially continuing, economic and political problems. Stock markets in many emerging market countries are relatively small, expensive to trade in and generally have higher risks than those in developed markets. Securities in emerging markets also may be less liquid than those in developed markets and foreigners are often limited in their ability to invest in, and withdraw assets from, these markets. Additional restrictions may be imposed under other conditions. Frontier market countries generally have smaller economies or less developed capital markets and, as a result, the risks of investing in emerging market countries are magnified in frontier market countries.

Derivatives Risk: Derivatives are instruments, such as futures and foreign exchange forward contracts, whose value is derived from that of other assets, rates or indices. The use of derivatives for non-hedging purposes may be considered more speculative than other types of investments. When the DFA International Real Estate Securities Portfolio uses derivatives, the Portfolio will be directly exposed to the risks of that derivative. Derivative instruments are subject to a number of risks including counterparty, liquidity, interest rate, market, credit and management risks, and the risk of improper valuation. Changes in the value of a derivative may not correlate perfectly with the underlying asset, rate or index, and the Portfolio could lose more than the principal amount invested.

Securities Lending Risk: Securities lending involves the risk that the borrower may fail to return the securities in a timely manner or at all. As a result, the DFA International Real Estate Securities Portfolio may lose money and there may be a delay in recovering the loaned securities. The DFA International Real Estate Securities Portfolio could also lose money if it does not recover the securities and/or the value of the collateral falls, including the value of investments made with cash collateral. Securities lending also may have certain adverse tax consequences.

Cyber Security Risk: The DFA International Real Estate Securities Portfolio’s and its service providers’ use of internet, technology and information systems may expose the Portfolio to potential risks linked to cyber security breaches of those technological or information systems. Cyber security breaches, amongst other things, could allow an unauthorized party to gain access to proprietary information, customer data, or fund assets, or cause the Portfolio and/or its service providers to suffer data corruption or lose operational functionality.

Performance

The bar chart and table immediately following illustrate the variability of the DFA International Real Estate Securities Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the DFA International Real Estate Securities Portfolio’s performance from year to year. The table illustrates how annualized one year, five year and since inception returns, both before and after taxes, compare with those of a broad measure of market performance.

DFA International Real Estate Securities Portfolio Summary Prospectus    5

The DFA International Real Estate Securities Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting http://us.dimensional.com.

The after-tax returns presented in the table for the DFA International Real Estate Securities Portfolio are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. A negative pre-tax total return translates into a higher after-tax return because this calculation assumes that an investor received a tax deduction for the loss incurred on the sale.

DFA International Real Estate Securities Portfolio Institutional Class Shares

Highest Quarter: January 2008–December 2014	(7/09–9/09	)	28.61
Lowest Quarter: January 2008–December 2014	(10/08–12/08	)	-33.03

Annualized Returns (%)

For the periods ending December 31, 2014

	1 YEAR			5 YEARS			SINCE 3/1/07 INCEPTION
DFA International Real Estate Securities Portfolio
Return Before Taxes		11.10	%		10.55	%		-0.28	%
Return After Taxes on Distributions		8.27	%		7.45	%		-2.81	%
Return After Taxes on Distributions and Sale of Portfolio Shares		6.35	%		7.06	%		-1.17	%
S&P Global ex US REIT Index(1) (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)		10.94	%		9.86	%		-0.46	%

⁽¹⁾  Copyright^© 2010 Standard & Poor’s Financial Services LLC, a subsidiary of The McGraw-Hill Companies, Inc. All rights reserved.

6    Dimensional Fund Advisors

Investment Advisor/Portfolio Management

Dimensional Fund Advisors LP serves as the investment advisor for the DFA International Real Estate Securities Portfolio. Dimensional Fund Advisors Ltd. and DFA Australia Limited serve as the sub-advisors for the DFA International Real Estate Securities Portfolio. The following individuals are responsible for coordinating the day to day management of the DFA International Real Estate Securities Portfolio:

• Joseph H. Chi, Senior Portfolio Manager and Vice President of the Advisor, has been a portfolio manager since 2005.

• Jed S. Fogdall, Senior Portfolio Manager and Vice President of the Advisor, has been a portfolio manager since 2004.

• Allen Pu, Senior Portfolio Manager and Vice President of the Advisor, has been a portfolio manager since 2006.

• Bhanu P. Singh, Senior Portfolio Manager and Vice President of the Advisor, has been a portfolio manager since 2012.

Purchase and Redemption of Fund Shares

Investors may purchase or redeem shares of the DFA International Real Estate Securities Portfolio on each day that the NYSE is open for business, regardless of whether the Federal Reserve System is closed, by first contacting the Portfolio’s transfer agent at (888) 576-1167. Shareholders that invest in the DFA International Real Estate Securities Portfolio through a financial intermediary should contact their financial intermediary regarding purchase and redemption procedures. The DFA International Real Estate Securities Portfolio generally is available for investment only by institutional clients, clients of registered investment advisors, clients of financial institutions and a limited number of certain other investors as approved from time to time by the Advisor. All investments are subject to approval of the Advisor.

Tax Information

The dividends and distributions you receive from the DFA International Real Estate Securities Portfolio are taxable and generally will be taxed as ordinary income, capital gains, or some combination of both, unless you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, in which case taxes are deferred until withdrawal from the plan or account.

DFA International Real Estate Securities Portfolio Summary Prospectus    7

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