Felix Alexander, from Worcester, was 17 when he was hit by a train on 27 April last year.
His mother Lucy Alexander has set up The Felix Project, launched at Pershore High School on Monday.
The programme aims to help teachers spot the signs of a child being victimised and to train pupils to give peer support.
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It is being run by the children's charity Place2Be.
Ms Alexander said: "I carry huge guilt that I did not say more when he was still alive and I feel compelled to give him a voice now."
Advice she gave out to the Pershore pupils included some words on banter, saying it is only funny if people are secure in their friendships.
Pershore High head teacher Clive Corbett backed the scheme, which Ms Alexander hopes will become embedded in the school curriculum.
"We will train pupils to be what we call a peer mentor, and also staff from this school and other schools to make sure we are providing training for them," he said.
"However well we feel we might do, we clearly can do things better."
Speaking after the event, a couple of the pupils said Ms Alexander was "inspirational".
She previously said her son was subjected to "cruel and overwhelming" taunts on social media, which eventually became unbearable.
An inquest heard he made friends at Pershore High School, where the staff described him as bright and kind, after facing difficulties at his previous school.

The Ibrox club ripped up its contract with Mr Ashley after it was alleged Rangers only received about 7p in every Â£1 spent on club products.
Mr Ashley claimed the deal, struck with former Rangers chief executive Charles Green, was wrongly terminated.
He took his case to the High Court in London where it has been agreed his litigation can continue.
Deputy High Court judge Richard Millett issued a written ruling after hearing competing arguments.
The judge gave no date for the next hearing.
In May, Rangers' directors said they were going to rip up contracts held with a merchandise company, Rangers Retail, which they ran with a Sports Direct firm.
Rangers chairman Dave King, who took control nearly two years ago, and other directors were unhappy with the arrangement.
William McCormick QC, who led the Rangers legal team, told Judge Millett supporters were also upset.
He said fans became angry after learning the club only got about 7p of every Â£1 spent and had staged a merchandise boycott.
Mr McCormick said fans thought Mr Ashley, who owns Newcastle United FC, pocketed too much of their money.
He said there was a widespread view that no "self-respecting" Rangers supporter wore a replica shirt.

The proposal concerns routes that make up the Belfast Rapid Transit (BRT) plan.
Currently bus lanes in Belfast run from 07:30 until 09:30 and from 15:30 until 18:30. Under the proposals this would be extended from 07:00 to 19:00.
The project is due to come into operation in September 2018.
"We should remember in 2012 the business case for the Belfast Rapid Transit was built upon the concept that these would be 12-hour, seven-to-seven bus lane priorities," said Mr Hazzard.
"That is so we can have maximum compliance and avoid confusion."
West Belfast
East Belfast
Titanic Quarter
Mr Hazzard said there would be two rounds of consultation on the proposals and said there could be some room for flexibility.
"What we can do and looking at other cities - Dublin for example - we may have loading and unloading windows and drop-off and pick-up times, where you have windows into that," he said.
"This is through consultation with those commuters, with those stakeholders and the community along the route so we can design our proposals and then go to a formal consultation period after."
He added: "These buses and vehicles will be coming across every seven minutes in and out of the city, it's so, so important that we get this right."
The mother of a teenager who took his own life because of online bullying has set up a programme to tackle the issue.
[NEXT_CONCEPT]
Sports Direct owner Mike Ashley has won the latest round of a legal fight with Rangers over a merchandise deal.
[NEXT_CONCEPT]
Transport Minister Chris Hazzard is proposing to extend the times of bus lanes on some of Belfast's busiest commuting routes.