For eight weeks, Clean Glasgow enforcement officers targeted the streets around city schools.
A similar enforcement blitz in the spring saw 184 young people penalised for littering – an average of 23 each week over an eight-week period.
However, that figure has now dropped to just three – with 24 under-16s penalised over the course of the entire operation.
Today Councillor Steven Purcell, Leader of Glasgow City Council, welcomed the improvement.
He said: "We have given young people the opportunity to take a lead in making the changes that will see their city become a cleaner, safer place.
“I am proud, but not at all surprised, that they are now showing their communities and the city as a whole that they are up to the challenge.
"It is also right and fair that we continue to support them by tackling problems where they arise - including schools.”
The operation took place in September and October, reaching a total of 35 schools. Independent evaluation of the results and progress of the Clean Glasgow Schools Charter is now underway.
The first enforcement phase, carried out earlier this year, saw 184 young people penalised in eight weeks – and the Clean Glasgow team saw anecdotal evidence of the strategy having a positive impact on the cleanliness of streets close to schools.
Young people penalised for littering have the option to pay a fine or take part in a community reparation project.
The Clean Glasgow campaign launched in February of last year, commencing with a three-month education phase before teams of community enforcement officers hit the streets to fine those littering around Glasgow. This was replicated in schools with the launch of the Schools Charter in May 2007.
A survey carried out revealed that almost 90% of pupils backed the City Council’s campaign to rid the city’s streets and communities of litter, graffiti, fly tipping, fly posting and dog dirt.
The survey also uncovered that 69% of pupils believe young people, like adults, should receive a £50 fine if caught dropping litter.
So far, more than 11,000 fixed penalty notices have been issued and more than 10,000 volunteers have taken part in hundreds of clean up events.