Here are some messages to Gordon Brown from pupils who have taken part in the postcard action.
Thank you to all pupils who took part. Unfortunately, we are only able to display a selection of messages here but your postcard will be sent on to Gordon Brown!
Messages from pupils at Prenton School
'What would you feel like if you had to go to war instead of school?' Ellie, 11
'They must feel so intimidated and scared! I can¿t imagine going to war at my age! I think you should give them safe places to eat, sleep and learn instead of risking their lives.' Rianna, 11
'Mr. Brown they don¿t want much. It's easy to say a promise. But is it easy to keep it?' Sophie, 12
'In my opinion I think that this is unfair! I am very lucky that I can go to a school and they can't. Everybody needs an education to succeed in life. Thank you.' Kelly, 13
'Gordon Brown, Gordon Brown, These girls are being let down! Sort it out Or people will cry out. SUFFERING Stop it NOW!!' Sally, 12
'Do it for us!! Do it for them!!' Robyn, 12
Messages from pupils of Swiss Cottage School for children with learning difficulties
'I think all girls should have the same chances as boys and be able to go to school.' Hasan, 16
'Girls should be able to go to school just like boys.' Simon, 15.
Messages from pupils at Camden Community School
'I think that it is awful that girls are treated with so much less respect than men in some countries. They are equal to men so should not be treated any differently.' Maya, 14
'Act as if it were British girls that couldn't go to school. Then you would do something!' Lucy, 14
'Girls should get treated the same sir. Your wife has got educated and is really smart.' Shamita, 11
Messages from 1st Upton Blewbury Guides
'I want to grow up in a world where girls and boys have the same rights as each other.' It is totally unfair for girls in other countries. I could not begin to imagine what it is REALLY like. Please pay attention to these letters and help girls in poorer countries. There is nothing different between me and a girl in Liberia, so our rights should be equal.' Jenny, 12
'Millions of girls are deprived of the basic rights we all have'. What's the difference between me and a girls in Liberia? Four thousand miles, but we both deserve equal rights.' Beth, 14
Messages from Willingdon Community School
'in 2007, you made a promise to do more for children having to live in conflict areas'.Many of these girls are dropping out of school because they are scared of walking to and from school. I am not scared of walking to school or being inside. Why should they be? We would like to see the UK government make sure these girls are getting an education. We want to see you keep your promise! PLEASE! Beth, 14
'I tried to empathise with the girls whose lives we learnt about but found it very hard because of the complete contrasts of our lives. I am disgusted about what I learnt and worried about the discrimination as well as the cruelty some girls are put through throughout their life.' Vanessa, 14
'Imagine an 8 year old holding an AK47, fighting grown men and cooking for an army.' Many girls are sexually abused whilst at war - if the girl becomes pregnant - they are often seen to be holding the enemy. Think about it, they're only children. Without their education they have nothing.' Dale, 14
Messages from 14th Southport Guides
'Just because another girl, like me, living in Afghanistan or somewhere like that, is at home looking after her brothers and sisters does not mean she is un-important or undeserving or a proper education', Hannah, 13
'Show girls they are just as important as boys. Show them that you care, we care everyone cares. They are not alone.' Patricia, 11
'I want other girls to be as lucky as me. Give them a chance. Remember you have the power to change the world!' Connie, 11
Messages from 37th Leeds Guides
'I really think you should keep your promise. Just because you are a man there is no excuse for not caring for the girls in poor countries. You really should look after them and help give them a proper education like mine'. Emilia, 10
'We girls should be given the attention and love that we need. We also deserve the same respect that boys get because we are girls. I deserve that because I am a Girl.' Ella, 11
'I am grateful to live in this country because of clean running water, enough money to live a comfortable life and not be forced into marriage and having children before I am ready. WE NEED TO HELP!' Lauren, 12