I'm also wondering, no idea really, the only thing I can do for now is list what we know:
According to
https://en.wikipedia.org/wiki/Diana_Ross_Presents_The_Jackson_5
- Reach Out, I'll Be There
- Listen I'll Tell You How
- Oh, I've Been Bless'd
- I'm Your Sunny One (He's My Sunny Boy)
- After You Leave Girl
- You've Really Got a Hold on Me (Jackson 5 version)
- Since I Lost My Baby"
- It's Your Thing
- A fool for you
- La-La (Means I Love You)
According to:
https://en.wikipedia.org/wiki/To_Sir_with_Love_(song)
- To Sir, with love
According to various sources:
- What's so good about goodbye
(Something that could be confusing though is that according to "Looking back to yesterday"'s Wikipedia page, there were also recording sessions in December 1969, so when a date says 1969, it's not necessarily the summer sessions.)
There could be also songs from "Come and get it: The rare pearls" and "I want you back!" unreleased masters... but I don't have info there, and I can't go check my CDs right now.
From listening to these recently I'm also wondering about:
- You ain't giving me what I want (so I'm giving it all back)
- Money honey
- Don't let your baby catch you??? (