I started playing in 1968. I used a Mel Bay book to learn chords. I learned songs from records. Scales were another thing altogether. I learned leads from records and had no idea what a scale was. Learned about them from music classes in school and other players. I remember the first time someone showed me the pentatonic scale he drew it in a notebook. And that was just the first position. I realized, from learning leads from records, that you could move up and down the neck. I just found the notes in different positions on the neck and wailed away. A few years later, when I saw it in a book, I realized I had it right. Good way to learn the neck. Just took a long time.