Before the first Clifford the Big Red Dog PBS TV series there was a six-volume direct-to-video TV series produced in 1988 by Scholastic in cooperation with Nelvana that was also called the Scholastic Learning Library and distributed on VHS by Family Home Entertainment. The series consisted of:
Clifford's Fun with Letters
Clifford's Fun with Numbers
Clifford's Fun with Shapes and Colors
Clifford's Fun with Sounds
Clifford's Fun with Opposites
Clifford's Fun with Rhymes
For anybody who does not know this series, here's a YouTube video of the intro:
Why hasn't this video series ever been released on DVD or iTunes? I mean, reruns of the Berenstain Bears TV show from the 80s aired on UPN at the same time as the 2003 version of the Berenstain Bears TV show aired on PBS.
Clifford's Fun with Letters
Clifford's Fun with Numbers
Clifford's Fun with Shapes and Colors
Clifford's Fun with Sounds
Clifford's Fun with Opposites
Clifford's Fun with Rhymes
For anybody who does not know this series, here's a YouTube video of the intro: