A new survey has found that three in four teachers are not completely sure about what to do if a child in their class has an asthma attack.
The charity Asthma UK found half the children they spoke to said their asthma meant they missed out on some lessons and school trips.
Do you have asthma? If so, does it affect your experience at school?
Or are there children in your class with the condition? Does it make it harder for them to join in?
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"I don't have asthma, but a kid in my friend's class has it, occasionally. And when she does have it, it's horrible. It gets hard for her to breathe and it looks as if she's in a lot of pain. I feel sorry for the kids who have it and hope they are and will be fine."
Iyath, 11, Maldives
"I don't have asthma, but I have a condition which affects my chest and breathing - I hate it. I need to take an inhaler (which I don't like taking) and sometimes just walking makes me out of breath. Sometimes I need to go to hospital because of it. It can be horrible at times."
Megan, 10, Dundee, Scotland
"I really don't like having asthma because when I run nearly a few metres I have to take my inhaler and it makes me shake and in my class you have to have neat writing and but mine is all messy!"
Saskia, 9, Northern Ireland
"I have asthma and it stops me doing lots of things in PE. It's stupid because my school won't keep an inhaler in Student Support like they did in Primary School, so I'm worried that I will forget it and something bad will happen."
Lauren, 13, Devon, England
"Asthma makes me slower in athletics. I want to be a sports person but it slows me down all the time although if you do take your inhaler it makes it 100% better for you!!"
Jim, 11, Kent, England
"I have asthma and I'm all OK as long as I take my brown inhaler in the morning and evening, and my blue inhaler before exercise but I have to have my blue inhaler with me 24/7 in case of an attack."
Amy, 13, Maidstone, England
"Sometimes when I run or do sports I have to take my asthma pump."
Desree, 13, London, England
"I have asthma and it's horrid. I often find it hard to breathe!!"
Porshe, 12, Oxfordshire, England
"My asthma makes me embarrassed because I come last in races and I am so sick of it."
Shelbie, 14, England
"I have had asthma for a long time now and it is very annoying. I can't run fast and when I do my chest tightens. My sister doesn't have it but she knows what to do if I have an asthma attack - call an ambulance."
Liane, 11, Bermuda
"I have asthma and especially at this time of the year I keep coughing. It's so annoying."
Holly, 10, UK
"I have asthma too and I also have to take my inhaler when we are doing PE. It used to be scary when I had an asthma attack or a coughing fit but I am used to it now. Unfortunately it has caused me to have chest infections, but it hasn't stopped me from doing my hobbies such as dancing and musical theatre."
Catrin, 10, Wales
"I have asthma and it was quite severe when I was younger, but as I've gotten older it has got better. My asthma was so bad when I was younger I had to have half days off throughout year."
Alysha, 11, Southampton, England
"I have asthma which is annoying because I get out of breath really quickly and people immediately think I am really unfit."
Rory, 11, Belfast, Northern Ireland
"I have asthma - I've had it for quite a while now but it's getting better. In PE I find it hard sometimes but it's better when I have my inhaler."
Lucia, 12, Oxford, England
"I have asthma and I hate it. I've had 27 attacks in my life and missed quite a lot of school."
Amy, 9, London, England
"I have asthma and last week I was running round the field but I had to stop and go inside to use my inhaler because my PE kit has no pockets. I felt a bit left out because the other two with asthma in my class did not need theirs!"
Mo, 10, Buckinghamshire, England
"I have asthma and so do many girls in my class, it affects some people more than others. We always have to have our inhalers with us. I sometimes struggle with PE but I have learnt how to cope with it."
Roshni, 14, London, England
"I have asthma and it's so annoying, I practically miss half the PE lessons in school because I get breathless. Once at school I really needed my inhaler so badly I couldn't breathe properly but my inhaler in school had run out and I couldn't use anyone else's. I was okay when my mum brought a new inhaler to school, phew!"
Rubie, 11, England
"I get asthma, not too badly but I can get it anytime. PE doesn't help neither does hay fever."
Jo, 10, Nottingham, England
"When I do too much exercise I run out of breath. It's hard because I am worried one day my pump won't be with me."
Emilia, 9, Essex, England
"I have asthma and it annoys me when I play sport in PE because I usually have to stop playing."
Aisling, 13, Ireland
"I have asthma and it's not that bad. I rarely have an asthma attack."
Molly, 10, London, England
"I suffer from really bad asthma and I have ever since I was born. I love sport but my asthma makes me feel that I can't do it, especially in summer."
Sophie, 13, Buckinghamshire, England
"I've got asthma and it slows me down in PE lessons and swimming lessons. My teacher was a nurse so she knows what to do for me. My school lets me carry my inhaler in my class."
Kellyanne, 10, Blackpool, England
"I don't have asthma but my sister does and in PE she's always getting breathless and her heart beats really fast."
Eunice, 10, London, England
"I used to have asthma but luckily I don't anymore. It was very annoying - I remember waking up in the night wheezing. It was also awkward because every morning at ten o'clock I remember going along to the office at school for my inhaler."
Niamh, 9, Scotland
"I have bad asthma, but I love running. My asthma makes me not able to run more than 200m as I get out of breath really easily."
Abie, 13, UK
"I used to suffer from asthma very badly and had to keep a nebuliser wherever I went but eventually I grew out of it. This just shows there is hope for everyone who suffers from it."
Robyn, 12, Oxfordshire, England
"I have asthma and it can get bad at times (especially when I'm playing football with my friends) but I've learnt how to deal with it."
Sunny, 14, London, England
"A girl in my class has asthma but she still participates in lessons and goes on school trips."
Emily, 11, London, England
"I don't have asthma and I really wouldn't like to have it either. Some people in my class have asthma and whenever we do running they get really out of breath and can't carry on. I feel really sorry for them."
Charlotte, 12, Peterborough, England
"My teacher doesn't know anything about asthma!! I have it severely but people in my school just don't really know how to deal with asthma. So when I'm having an attack I have to go and get my inhaler by myself. "
Ella, 11, Somerset, England
"I have asthma. Sometimes it affects me and I cough when I'm playing hurling so I need my inhaler."
Eve, 11, Ireland
"I have asthma but it's not that bad. Every winter it gets really bad and I have to use very strong inhalers. It sometimes means I cannot take part in sports which means I miss out. I know a girl with very, very bad asthma and she had to miss out on a sports performance she was giving because it was so bad. I think I am lucky compared to her, as she misses out on loads."
Kirsten, 13, Surrey, England
"I don't have asthma but one of my friends gets it quite bad."
Ellie, 12, Essex, England
"I have asthma but it doesn't really affect my school life. In PE sometimes I can't breathe easily, but I've only had an attack once and my teacher knew what to do. Lots of other people have it too and it doesn't really affect them either."
Pauline, 14, England
"Fortunately I don't have asthma but I do get quite breathless sometimes. Some people I know do have it but it doesn't seem to affect them."
Jasmine, 13, UK
"I have asthma and it is very bad - it means I can't do PE properly. I get breathless very easily but other than that I am fine."
13, Birmingham, England
"My friend has asthma and before PE she has to take her inhaler. Once she got a bit breathless and had to be taken to hospital but she hasn't had to miss out on anything."
Ilham, 10, London, England
"Asthma does not affect me at all unless I am doing sports!"
Harry, 12, Yorkshire, England
"I had asthma for five years but I am fine now. I still need to keep my inhaler just in case."
Marie, 12, Norfolk, England
"My sister has asthma and when she was little she had a few asthma attacks but it doesn't affect her very much now. Although when she has been out in the cold she gets wheezy and she has to have her inhaler.
Claudia, 11, Slough, England
"Asthma in my case isn't really a big problem, but when I have big games it gets really annoying. I don't mind having asthma but I'd rather not have it."
Chloe, 12, Ireland
"I have asthma, although it doesn't affect me much at school sometimes in PE I get a bit breathless and have to take my inhaler. Other then that all my school trips and lessons are fine. Three others in my class have asthma but it doesn't seem to affect them at all."
Aisha, 12, London, England