You know rabbit holes. I'm sure you do. Once you hear one thing, it reminds you of something else so you go hunting for that. That leads to another song or artist, and so on. When I fall into a rabbit hole, it can last for days. This time it was Ten Years After that started the wandering. It was their version of "Good Morning Little Schoolgirl", a live thing from 1975. Originally released in 1969 (I think) I'd heard them do it, but it's been years. But first, take a moment to behold the epic guitar face of Alvin Lee.
Johnny Winter And - Good Morning Little Schoolgirl (live) (streaming) at YouTube 1971
Muddy Waters - Good Morning Little School Girl (streaming) at YouTube 1963
Sonny Boy Williamson - Good Morning Little Schoolgirl (streaming) at YouTube 1937