ABC Radio sing a long book. These were used in primary schools in Australia in the 70's. Students sung along to music being played over the PA whilst sitting in their classroom and following the lyrics in this book. This was a weekly event.
Some of you may be able to remember the ABC Radio broadcasts to primary schools where you could sing along to such songs as Blowin' in the Wind.' This publication dates back to 1973 and features a wide selection of tunes along with educational chapters on health while also including a lot of interesting quizzes. Photo source: Private collection