School has asked for children to be able to bring laptops into school from September. What should I look for in a laptop, bearing in mind I'll need to buy 2, so preferably up to £500, suitable for school. Windows, not Chrome. (They do each currently have a very cheap one each which has been fine during lockdown, using my laptop when their cheap ones don't work for something, but I'll need to get them something better if they're at school so won't have my laptop as a backup)