Dart, the deal with my daughter was that before she could start learning the songs the site had, she had to go through the techniques. She was able to learn her major and minor scales, learned about the circle of fifths, chord structures, fingering techniques, etc....
I think she likes it because it's all video. She's never been one to pick up anything via staring at a book. I can't guaruntee that it will work for you but my daughter definitely liked practicing a lot more once she could use the songpond.com site.
BTW....just a little tip on remembering those Bass Clef notes. It's just like remembering the Treble Clef..
Treble Clef is -
Lines = Every, Good, Boy, Deserves, Fudge (E, G, B, D, F)
Spaces = the word FACE (F, A, C, E)
Bass Clef is -
Lines = Good, Boys, Deserve, Fudge, Always (G, B, D, F, A)
Spaces = All, Cows, Eat, Grass (A, C, E, G)
What I did to get the notes down was...
Since I already knew all the Trable Clef notes and was confidence about their location on the keyboard, I started playing only Bass Clef parts for a while so I could drill the location of the Bass Clef notes from the keyboard and the staff in my mind.
Once I felt confident that I could look at the sheet music and be able to locate the note on the keyboard without hesitation, I put the Treble and Bass back together. Then it's just like anything else, play it over and over and over and over...etc....