Apple macbook A1278 - I need to wipe / reinstall to be able to sell this

My daughter got a new mac.  Gave me this one to clean up /wipe / reinstall things so we can sell it.  Any thoughts on where I would start to wipe it (no data on there that we need).

The box it came in has 2 DVDs - 1 marked 13 inch MacBook pro OS X (v10.6.7) install disk and an application DVD

MacBook Pro "Core i5" 2.3 13" Early 2011 2.3 GHz Core i5 (I5-2415M)    
Intro Date: February 24, 2011 Disc Date: October 24, 2011
Order No: MC700LL/A Model No: A1278 (EMC 2419*)
Subfamily: Early 2011 13" Model ID: MacBookPro8,1
Std RAM: 4 GB Std VRAM: 384 MB
Std Storage: 320 GB (5400 RPM) Std Optical: 8X DL "SuperDrive"
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strungCommented:
Boot from the install CD. It will boot to a page giving you the option of opening Disk Utility (this may be in a menu).

Open Disk Utility and use it to erase the drive. Click on the securities options button and choose the option to right zeros over the drive.

Once the drive is reformatted, re-install the operating system.
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