Tory election chiefs have given their candidates a letter-writing kit to target farmers, pensioners and women, leaked documents have revealed. A series of model letters have been drawn up with carefully pre-crafted messages designed to woo voters with just 28 days to go before the May 7 election. Women are told they are 'vital to the success of the British economy' while pensioners are praised for their 'wealth of experience'. A series of model letters have been drawn up with carefully pre-crafted messages designed to woo voters with just 28 days to go before the May 7 election . The letter-writing kit was revealed today as David Cameron made a campaign stop  at the National Grid Training Centre in Newark . Tory candidates are told to praise teachers as 'the best we have ever had' and tell farmers that they are 'vital' the party's economic plan, according to the leaked letter-writing guide. The letter templates are aimed at what party headquarters describes as 'target groups' in the electorate. Tory chiefs believe there are seven groups of voters who can be persuaded to change their vote in the run up to the election, including military veterans, pensioners, teachers and parents. The other groups Tory candidates are asked to target are women, young voters and farmers. There are also a number of letters 'written specifically for individual subjects', including defence, immigration and Europe. It advises activists: 'People are more likely to respond to a message from you if you write to them on an issue that they are directly interested in. 'This pack aims to provide you with pre-written examples you can use as the basis on which to write to people on issues that they raise.' The 37-page document, leaked to the Guardian, tells its candidates to tell women: 'Conservatives are committed to ensuring equal opportunities for men and women in all aspects of their lives. 'We are supporting women in work and providing greater financial security by reducing taxes, cutting the cost of childcare, addressing the gender pay gap and introducing shared parental leave.' Leaked documents reveal Tory election chiefs have given their candidates a letter-writing kit to target farmers, pensioners, women and other target voters - as well as advice on how to respond to questions about certain subjects . The letter templates are aimed at what party headquarters describes as 'target groups' in the electorate . The pack also says: 'Women are vital to the success of the British economy, and because our long-term economic plan is working, there are now more women in work and more women running their own business than ever before'. A pensioner who has raised an issue may receive a letter that says: 'Conservatives believe that if you have worked hard, saved, paid your taxes and done the right thing, you deserve dignity and financial security when you retire. 'We want a country where you get something for something, not something for nothing.' A Tory spokesman refused to comment about the letter-writing guide. But Labour MP Graham Jones said: 'This pack contains thousands of words but, as usual with the Tories, no answers. 'Rather than pumping out propaganda, what they should be doing is providing an explanation for their extreme plans, which would put the NHS at risk, and an answer as to whether they'll give millionaires yet another tax break.' Green Party activists have been told to dress in 'mainstream' fashion while knocking on doors in a bid to win over sceptical voters. A manual for the party's supporters urges them to appear 'level headed' and 'agreeable' – and even encourages them to compliment people's homes. The advice, which has been distributed among Green campaigners in London, also provides stock answers to ease voters' concerns about their radical plans to dismantle the army, legalise drugs and pay everybody £72 a week no matter how rich they are. A Green campaigning manual urges activists to dress in 'mainstream' fashion - unlike the campaigners pictured with the party's only MP Caroline Lucas at a fracking protest at Balcombe, West Sussex (above) It comes amid growing scrutiny of the Green Party's manifesto commitments after its membership surged to more than 50,000, outnumbering the Liberal Democrats and Ukip. But the party's surge in support was hit by a series of disastrous media appearances from the party's leader Natalie Bennett in which she struggled to explain her key policies. In February she suffered what she called a 'brain fade' on LBC Radio when she forgot the details of her party's key housing policies. Ms Bennett endured another tough interview yesterday - and was forced to defend her proposal to give every adult in Britain a guaranteed weekly income. She admitted the so-called 'citizens income' – which critics say would cost £280billion – would take longer than five years to bring in, and could take even longer. Ms Bennett also admitted that another Green pledge – to dismantle the Armed Forces and use weapons factories to build wind turbines – was also a 'long-term aspiration'. The party also supports leaving Nato and abandoning nuclear weapons. The Green manual for volunteers aims to ease voters' concerns over the party's radical platform.
Series of model letters  drawn up with carefully pre-crafted messages . Tory candidates are told to praise teachers as 'the best we have ever had' Women should be told they are 'vital to the success of the British economy' Pensioners, meanwhile, are praised for their 'wealth of experience'