The Hold Up can still be purchased. Originally from the series on “Master Classes for the Media Arts,” it is, at any rate, still available from First Light Video Publishing. You can buy the whole kit with Roger Ebert commentary and completed versions of the bank robbery, or just the rushes, as I have done in the past. Available in various formats. I bought it some years ago on VHS and later digitized it to teach continuity editing in Final Cut Pro in my summer class that has an accelerated five-week term.
I used to use the Gunsmoke editing exercise way back when, but I lost the tapes! Does anyone still have this? I found a professor over the web more than a year ago who was still using it, and his assistant was supposed to copy it for me and send it to me, but they never did.
Another exercise (corny, and dated, like The Hold Up) is Crisis on Campus, about a [fake] hostage-taker and active shooter on a college campus. (How prophetic.) I have used this in the past in broadcast journalism class. A variety of news packages can be made from the raw footage. This is also now sold through First Light Video Publishing, and I think it originated with the folks who did The Hold Up back in the day.
Please, if anyone has the rushes from the Gunsmoke editing exercise, let me know how I can obtain these!