Los Angeles Unified School District Purchases Apex Learning's AP Exam Review; District Renews Contract to Provide Online Advanced Placement Test Prep to Studen

"By offering AP Exam Review again this year throughout the
District, we're providing our AP students with a high quality AP test
preparation program," said Sheila Smith, district coordinator,
Gifted/Talented Programs, Los Angeles Unified School District. "For
students in our regular AP courses as well as those taking online
courses from Apex Learning offered by the District, active use of AP
Exam Review helps to ensure they have the best chance for success on
their spring Advanced Placement exams," she said.
AP Exam Review is a comprehensive online test preparation and
study resource for students taking the Advanced Placement exams in
May."
The Company also established guidance for the third quarter of 2005 and
updated its guidance for the full year 2005.18 $0.

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S.----Groove Networks
Inc., Molecular Devices
Corporation (Nasdaq: MDCC) today announced record revenues and earnings for
the quarter ended June 30, 2005.

Conference Call Information
An earnings announcement conference call is scheduled for Wednesday, July
27, 2005 at 8:00 a. Interested parties can
participate in the call by dialing 877-704-5385 (domestic) or 913-312-1303
(international).

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Apex Learning is in its seventh
year of providing online curriculum resources to schools, districts,
and regional and state education agencies. Eventually the
NSF intends to use Groove to help NSF staff and the international
community of scientists, engineers and educators improve business
practices and pursue new methods of scientific communication,
collaboration and decision-making. For more information about
Groove Networks, visit http://www. Operating income for the second
quarter of 2005 was $6. Finally, we continue to believe that our life sciences and
drug discovery markets will remain stable in the near-term . For the third quarter of 2005,
the Company anticipates revenues of $44 to $46 million and fully diluted GAAP
earnings per share of $0.m.

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groove.m.

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SUNNYVALE, Calif.0 million, or an increase of 59% compared to the same
period last year.92 to $0. PDT (11:00 a.

About Molecular Devices Corporation
Molecular Devices Corporation is a leading supplier of high-performance
bioanalytical measurement systems that accelerate and improve drug discovery
and other life sciences research.

Molecular Devices enables its customers to improve research productivity and
effectiveness, which ultimately accelerates the complex process of discovering
and developing new drugs.

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Government +
Politics and U. We're
optimistic that collaborative workspace technologies can play an
important role in helping NSF sustain and even enhance its recognized
excellence in management practices, and help transform the way
scientific research teams worldwide coordinate their work. delivers the "virtual office" through software
that allows teams of people to work together over a network as if they
were in the same physical location.5 million, or an increase of
38% compared to the same period last year . The Company's systems and consumables
enable pharmaceutical and biotechnology companies to leverage advances in
genomics, proteomics and parallel chemistry to facilitate the high-throughput
and cost-effective identification and evaluation of drug candidates. Any statements contained
in this press release that are not statements of historical fact may be deemed
to be forward-looking statements .


MOLECULAR DEVICES CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
(in thousands, except per share amounts)

Three Months Ended Six Months Ended
June 30, June 30,
2005 2004 2005 2004
(unaudited) (unaudited)

REVENUES $44,537 $32,205 $83,602 $59,542

COST OF REVENUES 17,600 12,075 32,647 22,318

GROSS PROFIT 26,937 20,130 50,955 37,224

OPERATING EXPENSES:
Research and development 6,309 4,709 12,535 8,726
Selling, general and
administrative 14,593 11,616 28,907 22,536

Total operating expenses 20,902 16,325 41,442 31,262

INCOME FROM OPERATIONS 6,035 3,805 9,513 5,962
Interest and other income
(expense), net (62) 49 (26) 85

INCOME BEFORE TAXES 5 ,973 3,854 9,487 6,047
Income tax provision (2,270) (1,349) (3,605) (2,113)

NET INCOME $3,703 $2,505 $5,882 $3 ,934

BASIC NET INCOME PER SHARE $0.

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AP Exam Review is available for 14 of the most popular AP subjects
including Biology, Calculus AB, Chemistry, English Language, English
Literature , French Language, Macroeconomics, Microeconomics, Physics
B, Psychology, Spanish Language, Statistics , U.moleculardevices.22 $0.

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George Strawn, the NSF's CIO.

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National Science Foundation Purchases Groove Virtual Office To Improve Coordination And Productivity Among Working Groups

"We're excited about the potential online collaborative workspace
technologies have for helping our project teams make better decisions
more quickly," said Dr.
Revenues for the quarter were a record $44.

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Fully diluted earnings per share for the second quarter of
2005 were $0.22 $0 .

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The NSF is just one of many government and non-governmental
organizations using Groove Virtual Office for ultra-secure,
intra-agency and inter-organizational collaboration, information
sharing, project management and decision-making. For the full year 2005, the Company
anticipates revenues of $181 to $185 million and fully diluted earnings per
share of $0.34 $0.

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Through a series of diagnostic tests, AP Exam Review identifies a
student's specific areas of weakness and provides a personalized study
plan that leads students through originally developed instructional
material to help them improve their understanding of specific topics."
The NSF purchased Groove Virtual Office in December and is
gradually introducing use among its internal committees and working
groups., Molecular Devices' President and Chief Executive Officer.22 to $0.

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Business Editors

SEATTLE----Advanced Placement(a)
students from the Los Angeles Unified School District are using AP
Exam Review from Apex Learning(R) to prepare for their 2005 AP(a)
exams as a result of an agreement announced today by the nation's
second largest school district and the leading publisher of online
instructional materials for secondary education.
Practice questions from previous AP exams and online help from
experienced AP teachers give students a wide variety of resources to
help them perform at their highest levels.

About Apex Learning

Apex Learning is a leading publisher of online instructional
materials for secondary education.D. In drug discovery, we saw excellent growth in both our
high -content cellular imaging and our high-throughput electrophysiology
product lines.17 $0.

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colleges and universities.6 billion for support of research in many fields, from
mathematics and computer science to the social sciences. The NSF mission is to keep the U.22, or an increase of 29% compared with the same period last
year.

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The NSF is an independent federal agency that funds approximately
20 percent of all federally supported basic research conducted by U.S.96.com).

This press release contains "forward-looking" statements, including
statements related to future revenues and earnings.

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27

SHARES USED IN COMPUTING BASIC
NET INCOME PER SHARE 16,872 14,246 16,989 14,414

SHARES USED IN COMPUTING DILUTED
NET INCOME PER SHARE 17,135 14,394 17,261 14,588


MOLECULAR DEVICES CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(in thousands)

June 30, December 31,
2005 2004
ASSETS (unaudited)
Current assets:
Cash and cash equivalents $12,465 $30,175
Accounts receivable , net 35,061 36,995
Inventories, net 24,837 25,785
Deferred tax assets 8,438 9,654
Prepaids and other current assets 2,736 2,780
Total current assets 83,537 105,389

Equipment and leasehold improvements , net 10,790 11,762
Other assets 148,000 138,078
$242,327 $255,229

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable $6,924 $7,085
Accrued liabilities 23,775 30,748
Total current liabilities 30,699 37 ,833

Long-term liabilities:
Other long-term liabilities 1 ,128 1,452
Deferred tax liabilities 5,251 5,324
Total long-term liabilities 6,379 6,776

Stockholders' equity 205,249 210,620

$242,327 $255,229

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Registered students receive unlimited
access to AP Exam Review from their date of enrollment until June 30,
2005. With collaborative
workspace solutions, our project teams can create secure, virtual,
persistent workspaces where files are stored , discussions occur in
context, and meeting notes and action items are tracked.

About Groove Networks

Founded in October 1997 and headquartered in Beverly, Mass. Groove software helps
organizations , large and small, save money, time and eliminate travel
by offering both a desktop application for instant joint work, and a
set of customizable, open collaboration capabilities that enhance the
utility and value of existing solutions.

Molecular Devices Reports Record Revenues and Earnings for Second Quarter of 2005

"We are encouraged by our second quarter results, as we saw organic growth
in both our life sciences and drug discovery product families," stated Joseph
D.35 $0.

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S. Apex Learning is
accredited by the Northwest Association of Accredited Schools. Last month, the NSF proposed a fiscal 2006
budget of $5. "Previously, our
committees and working groups have coordinated their work in email,
which is increasingly ineffective and frustrating.
"In life sciences, we continued to see strong demand for our SpectraMax(R) M5
bench-top reader. Words such as "believes," "anticipates ,"
"plans," "expects," "will," and similar expressions are intended to identify
forward-looking statements.27

DILUTED NET INCOME PER SHARE $0.

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Keegan, Ph.

timekeeping condensed

Initially, the NSF plans to use Groove Virtual Office to improve
collaboration, coordination and decision-making among its internal
committees, working groups and communities of practice. The NSF ensures that research is fully
integrated with education so today's revolutionary work will also be
training for tomorrow 's top scientists and engineers. A free Trial edition of
Groove Virtual Office is available at http: //www.net/download

Groove Networks and Groove are registered trademarks of Groove
Networks Inc. EDT).

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(a) AP and Advanced Placement Program are registered trademarks of
the College Entrance Examination Board, which was not involved in the
production of, and does not endorse, Apex Learning products.
Investors can also access a live web-cast of the call through a link
posted on the investor page on Molecular Devices' website
(http://www.

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net.groove. All other trademarks are owned by their respective
companies. There are a number of important factors that could
cause the results of Molecular Devices Corporation to differ materially from
those indicated by these forward -looking statements, including, among others,
risks related to variations in the amount of time that it takes for the
Company to sell its products and collect accounts receivable, the timing of
customer orders and the Company's dependence on orders that are shipped in the
same quarter, which gives the Company limited visibility of future product
shipments, risks related to increased competition, risks associated with the
Company's need to develop new and enhanced products and other risks detailed
from time to time in the Company's SEC reports, including its Quarterly Report
on Form 10-Q for the quarter ended March 31, 2005. Molecular Devices
Corporation does not undertake any obligation to update forward-looking
statements.

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History.

Business Editors/High-Tech Writers

BEVERLY , Mass. today announced that the National Science Foundation (NSF)
recently purchased several hundred copies of its virtual office
software to improve coordination among its internal committees and
working groups. at
the leading edge of discovery in areas from astronomy to geology and
zoology.,
Groove Networks Inc. A replay of the web-cast will be available at
this location from July 27, 2005 to such time as the company reports its
financial results for the third quarter of 2005.

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During this time, Apex
Learning has supported students from 4,000 school districts in all 50
states with more than 400,000 enrollments in its online courses,
ClassTools(R), Beyond Books(R), and AP Exam Review .

About NSF

Headquartered in Arlington, VA, the NSF has a workforce of about
1,700 that supports all fields of fundamental science and engineering,
except the medical sciences. In addition to funding research in the traditional academic
areas, the agency also supports "high-risk, high pay-off" ideas and
novel collaborations. Replay dial-in numbers are 888-203-1112 (domestic) and
719-457-0820 (international), and the access code for the replay is 8417181. The
Company's solutions are based on its advanced core technologies that integrate
its expertise in engineering, molecular and cell biology and chemistry.

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S.24.

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