We all know what it's like when you've spent ages doing your homework and then suddenly the computer crashes! Argh!!
Over the summer a tech company asked lots of teachers and school kids what the most common excuses were for late homework.
Blaming it on technology is the most popular, with "I emailed it to you, but I got a bounce-back email" coming out on top.
Do you blame it on the tech if your homework's late?
Is it easier to get away with if teachers aren't as clued up on gadgets as you?
Or what's the worst excuse you've heard?
This page is now closed. Here are some of the comments you sent in.
"I did it on the computer and my computer crashed so I could not save it."
Rebecca, 11, Stoke-on-Trent, England
"Well, very often it is the computers fault! Our computer's really old and there is often problems."
Dani, 14, Flintshire, Wales
"My family got a new paper shredder and we had to see if it was working."
Matilda, 9, New York, USA
"I just tell the truth! Our teacher gives us three warnings, so if we forget our homework three times, we get punished!"
Holly, 10, County Durham, England
"The good old trusty one of, I forgot it."
Fatima, 13, Leicester, England
"My bag got stolen, so I couldn't do it."
Ella, 12, London, England
"I don't blame my computer because it's a Mac. Macs can't get viruses and mine has never crashed."
Scott, 11, Scotland
"My dad shredded it because he thought it was rubbish, then threw it in the compost heap!"
Isobel, 8, Sheffield, England
"My excuses fall under 'my printer broke', which it actually has and the library one also broke! But the line is getting old, true as it is."
Erin, 10, England
"If I need an excuse, I usually say I'm sure it was in my bag, but I could have left it on the table and my mum might have accidently recycled it. It's no use blaming technology in my school, because they tell you to use the computers in school if you have a problem."
Lauren, 13, South Glamorgan, Wales
"Everyone in my school knows that I do the computer homework at my dad's, so then when I forget my homework, or I haven't done it, I just say I left it at my dad's and he can only give it to me next weekend!! The worst one I've ever heard was that someone's homework was abducted by aliens and they would disintegrate the earth unless they gave it to them!"
Christine, 10, Surrey, England
"I say my mum and I must have got mixed up and I have my brother's homework!"
Chloe, 11, Lincolnshire, England
"Possibly the funniest excuse I've ever heard is my best friend's latest one - she went to the dentist and left it there!"
Eve, 12 Cheshire, England
"The best tip is to say, sorry I forget to write when it was due, so I didn't know when to bring it in i am really sorry I am really sorry."
Chloe, 11, Stevenage, England
"This is my best excuse: "Umm, I left it at home". That's the most believable!"
Lola, 10, Plymouth, England
"I made my worksheet into a paper aeroplane but it got hijacked."
Luke, 12, Hertfordshire, England
"Normally I say that my dad thought it was junk and put it in the shredder!"
Beth, 11, Kent, England
"I left it in my house and my dad accidentally shredded it."
Sean, 12, London, England
"I always say I forgot to do it and they give me till the next day. It always works."
Courtney, 13, Suffolk, England
"Most of the time I do it very last minute."
Daniel, 10, Scotland
"The best excuse I've ever heard is 'I had a virus on my computer and it wiped everything off my hard drive so I couldn't print it off.'"
Monique, 11, London, England
"My dog stood on it and ripped it up, or my sister put it in the shower and it got wet, or it got mixed up with other papers and was put in the loft!"
Josie, 11, Glasgow, Scotland
"I did do it but I lost my exercise book which I wrote it in."
Freya, 11, Wales
"It was raining and my homework got wet and ripped."
Daniel, 12, London, England
"Well I'm always let off when I say to my teacher that I did it on the computer but when I needed to print it out we ran out of paper!"
Melissa, 12, Birmingham, England
"I normally say my internet has broken and my emails don't work! And I say school has blocked me from emails and we don't have a printer!"
Keeley, 13, Yorkshire, England
"I used the one that my computer had broken down and lost everything."
Megan, 12, Suffolk, England
"My printer broke down just as I was printing off the last page of my homework but my teacher didn't believe me!"
Molly, 11, Manchester, England
"My best excuses are that my dad thought it was junk and put it in the shredder! Or when you were handing out the homework I was in the toilet!! Or there's the obvious - my computer crashed!"
Beth, 11, Kent, England
"My friend came over for a sleepover and I forgot to do it!"
Cara, 8, Co. Tyrone, N. Ireland
"My best excuse for not handing in my homework is that I've got a club every night of the week. I don't think we should have homework anyway!"
Adam, 9, Norfolk, England
"I made a paper plane out of it and it got hijacked, or that my dad accidentally put it in his briefcase and took it to work. Works every time!"
Shannen, 13, Perthshire, Scotland
"I always tell teachers that I gave it to them already and they've forgotten!"
Sam, 12, London, England
"A good excuse my friend used was that she didn't have her homework because her mum wrote loads of important work details on it and she 'needed' it, so couldn't hand it in!"
Katie, 11, Nottingham, England
"I always say that I saved it but, when I came to print it off, it hadn't saved it. Always works!"
Maisie, 13, Kent, England
"I think the best excuse for forgetting your homework is that you left it in your locker and can give it in later. That's only if you're in secondary school though. The worst excuse is you've been abducted by aliens during your sleep and they took your homework."
Natalie, 11, Oxfordshire, England
"My mum spilt tea all over it, or I usually say I've forgotten it or it's at home."
Koreandra, 13, Bristol, England
"My printer broke or it went in a puddle!"
Tom, 12, London, England
"The worst excuse I have heard is that I was walking to school and it spontaneously combusted!"
Ben, 11, Port Talbot, Wales
"I say I put it on my other pen drive and I picked up the wrong one."
Sophie, 14, UK
"I couldn't do my homework because my mum wouldn't let me on the computer!"
Brad, 11, Hertfordshire, England
"My best excuses are my computer crashed, My mum thought it was junk and threw it in the bin or I don't remember you giving out homework."
Ben, 9, Middlesex, England
"The worst excuse I have ever heard is that someone was doing their homework on the beach and the tide came in and it got all wet!!!"
Bethany, 14, Cornwall, England
"I usually just say I forgot to put it in my bag but I can bring it in tomorrow. Or that I can't find it. But I usually do my homework anyway."
Aimee, 13, Dunbartonshire, Scotland
"If I don't have my homework I say I've forgotten it and some teachers let me off. But once my printer broke down and I had to go to school and the very next morning the homework was due!"
Diana, 13, London, England