The McGraw-Hill Companies to Present at the Merrill Lynch TMT Conference in London.

Business Editors

NOTE: Please see the CORRECTION FOR U.S. AND UK PARTICIPANTS

section of this announcement

NEW YORK--(BUSINESS WIRE)--June 6, 2001

Harold McGraw III, chairman, president and CEO of The McGraw-Hill Companies (MHP: NYSE) is scheduled to speak at the Merrill Lynch TMT conference on June 6 from 1:30pm - 2:10pm GMT Time (8:30am - 9:10am Eastern Time/USA). The presentation will be accessible via dial-in conference capabilities.

Mr. McGraw will discuss key trends that underpin the Corporation's growth opportunities and management's expectation for continuing growth. Discussions may include forward-looking information.

CORRECTION FOR U.S. PARTICIPANTS: PLEASE NOTE THAT THE TIME OF THE CALL IS 8:30 EASTERN TIME/U.S.A., NOT 7:30AM AS INITIALLY ANNOUNCED ON MAY 31. WE APOLOGIZE FOR THE ERROR. THE NEW TOLL-FREE DIAL-IN NUMBER FOR U.S. PARTICIPANTS IS 1-888-390-0683.

CORRECTION FOR U.K. PARTICIPANTS: PLEASE NOTE THAT THE NEW DIAL-IN NUMBER IS 44-207-943-5370.

The country/dial-in numbers are now as follows:
-----------------------------------------------
U.S.                     1-888-390-0683
France                   33-1-70-75-00-00
Germany                  49-69-2222-52100
Netherlands              31-20-710-0075
Switzerland              41-1-580-7809
U.K.                     44-207-943-5370

To access the call by telephone, please call approximately 15 minutes before the start of the call to complete the registration process. The passcode is "McGraw-Hill" and the conference leader is Harold McGraw III.

View the presenters' slides on the Internet while listening by telephone (optional):

Please follow the telephone dial-in instructions first before viewing the slides online via the Internet. For Technical Assistance during the presentation, dial *0 for operator assistance. To view slides during the call: 1. Go to Web address http://netconf7.wcom.com 2. Click on "Net Conference" 3. Enter Conference ID Name: 1350429 4. Enter Conference Password: MCGRAW HILL 5. Click on "Enter Conference"

Replay Options Available from June 6 to June 13, 2001

By telephone: A recorded replay will be available two hours after the end of the call and will be available through June 13, 2001. The U.S. replay number is 1-800-327-0535, the U.K. replay number is 0800-018-1529. For international participants, the replay number is 1-402-220-0186 (long distance charges will apply).

By Internet: To listen to the presentation through the Internet, follow these steps:

- Audio-only: Go to www.mcgraw-hill.com/investor_relations. On the IR homepage, click on the WEBCAST-REPLAY button. Enter the necessary information in the Guest Book and proceed. You will need RealPlayer. - Audio and slides: Go to http://netconf7.wcom.com. Click on "Net Replay." Enter the necessary information as well as the conference ID name (1350429) and password, (MCGRAW HILL.) You will need Windows Media Player 6.0 or higher. For assistance during the replay, call the WorldCom Help Desk at [phone], select option no.3, and then option no. 2.