PROSPECTUS

February 28. 2009

Please carefitlly read the important information it contains before investing.

D FA INVESTMENT

DIMENSIONS GROUP

INC.

DIMENSIONAL

INVESTMENT GROUP INC.

The two investment companies desclibed in this Prospectus offer a valiety of investment portfolios. Each of the investment

companies' Portfolios has its own investment objective and policies, and is the equivalent of a separate mutual fund.

DFA International Value P0l1folio, Global Equity P0l1folio , Global 60/40 P0l1folio and Global 25175 POl1folio

are offered by Dimensionalll1Vestment Group Inc. The other listed P0l1folios are Palt of

DF

A

Investment Dimensions Group Inc. The P0I1folios described in this Prospectus are designed

for long-term investors, except as otherwise described in this Prospectus.

PORTFOLIOS FOR INVESTORS SEEKING TO INVEST IN:

DOMESTIC EQUITY SECURITIES

u.s. Lal'ge Company Portfolio U.S. Core Equity 2 Portfolio

Enhanced U.S. Large Company Portfolio

T.A. U.S. Core Equity 2 Portfolio

u.s. Large Cap Value Portfolio

U.S. Vector Equity Portfolio

U.S. Smal1 Cap Value Portfolio U.S. Small Cap Portfolio

U.S. Targeted Value Portfolio U.S. Micro Cap Portfolio

U.S. Core Equity 1 P0l1folio DFA Real Estate SeClllities Portfolio

INTERNATIONAL EQUITY SECURITIES

Large Cap International Portfolio DFA International Real Estate Seclllities Portfolio

DFA International Value Portfolio DFA Global Real Estate Securities Portfolio

International Core Equity Portfolio DFA International Small Cap Value Portfolio

T.A. World ex U.S. Core Equity Portfolio International Vector Equity Portfolio

International Small Company Portfolio Emerging Markets Ponfolio

JapalleSe Small Company Portfolio Emerging Markets Value Portfolio

Asia Pacific Small Company Portfolio Emerging Markets Small Cap Portfolio

United Kingdom Smal1 Company Portfolio Emerging Markets Core Equity Portfolio

Continental Small Comp<uJy Portfolio

FIXED INCOME

SECURITIES

DFA One-Year Fixed Income Portfolio DFA Intermediate Government Fixed Income Portfolio

DF A Two-Year Global Fixed Income Portfolio DFA InHation-Protected Securities Portfolio

DFA Selectively Hedged Global Fixed Income Portfolio

DFA ShOlt-Ternl Municipal Bond Ponfol io

DFA Five-Year Government Portfolio

DFA California Short-Term Municipal Bond Portfolio

DFA Five-Year Global Fixed Income Portfolio

ALLOCATION PORTFOLIOS

Global Equity Portfolio Global 25175 Portfolio

Global 60/40 Portfolio

INSTITUTIONAL CLASS SHARES

This Prospectus describes the Instituti o

nal

Class shares of each Portfolio which:

Are generally available only to institutional investors and clients of registered investment advi sors.

Do not chal'ge sales commissions or loads.

Each Portfolio (except the U.S. Small

Cap

Value Portfolio, T.A. U.S. Core Equity 2 P01tfolio, U.S. Micro Cap Portfolio ,

T.A. World ex U.S. Core Equity Portfolio, Japanese Small Company P011folio, Asia Pacific Small Company Portfolio,

United Kingdom Small Company Portfolio, Continental Small Comp any Portfolio,

DFA

Global Real Estate Securities

Portfolio,

DFA

International Small

Cap

Value Portfolio, International Vector Equity Portfolio, Emerging Markets Small

Cap

Portfolio, DFA Selectively Hedged Global Fixed Income P011folio, DFA Short-Term Municipal Bond P0l1folio and DFA

California Sh011-Term Municipal Bond Portfolio) also offers two additional classes of shares, Class Rl shares and Class R2

shares, which are offered to qualified investors in a separat e prospectus.

The Securities and Exchange Commission has not approved or disapproved these securitiesorpassed upon the adequacy of

this Prospectus. Any representation to the contrary

is

a criminal offense.