This is 12 CDs .nrg and its very very useful education CDs video and audio and recording your voice to check if your accent is near to American Accent Language ,and grammar, and there is many practicing .
the 12 CDs : 1 for the setup 11 for the 11 levels and its divided to - Basic . - Intermediate . - Advanced . - Review . - Executive . how its work : Mount the 1st CD and setup the software . ( it named Setup ) 2nd mount the CD you want to start . Then at star > all programs u will found English Discoveries after you click on it u will find all the cds names choose the one you mount and start studying.