"former lesson" is correct and usable in written English.
You can use it to refer to a lesson that someone learned in the past. For example, "I have learned many lessons during my time in college, but the former lesson about time management has been the most beneficial."
The session was about positive behaviour management and there was nothing that had not been heard before if I'm completely honest, but I'm always willing to listen and to remind myself of former lessons learned.
The former teach lessons, run local tournaments and take cash for greens fees and other services at the pro shop counter.
Mr Koizumi may now be back to teach his former protégé a lesson.
She wants to teach them courage, tries to impress on them her former teacher's lesson that "we can alter fate," that "for us, as humans, there is choice".
Winter, who helped Miliband to win the Doncaster North seat in May 2005, wrote that his 10-year-old daughter gave his former ally a lesson in economics and how Miliband nearly missed a meeting with Gordon Brown by locking himself in a house.
"There is a lesson," former President George W. Bush said in a speech at the Reagan library in California on Wednesday, "when the United States decides to not take the lead and withdraw.
The country has seen 11 minority administrations in the past century, yet those with strong leaders have managed both to endure and to deliver big legislative changes.Other bits of the former empire offer lessons, too.
Rajeev told me that the agency might have a higher profile if former volunteers applied lessons from the developing world to U.S. politics, which is the opposite of how most people think of the Peace Corps.
This is a business issue and should not be politicised, for instance by suggesting that Russia is punishing its "former vassals".The lessons for east Europeans are: learn to live without Russian subsidies, and don't blackmail Russia with threats of disruption to Russian energy supplies.
And as they crank out their own daily contributions and links, they're starting to see blogging as a way to reach out to and research opinion formers, as a lesson in online media, and ultimately as a place they might eventually make a little money.
