Both Software Development: Core Techniques and Principles as well as Visual Basic.Net for Education: 2010 Edition are texts that are being used by VCE Software Development Unit 3&4 students. In recognition of this, both texts are being sold as a package with a special discount. Instead of totalling $154 (inc-GST) (if purchased separately), if purchased as a package, they are being sold for $121 (inc-GST) - a saving of more than 20%.