There’s a free resource here which May help, it’s more about the philosophy around 1 to 1 devices but I know there are lots of IT resellers who support 1 to 1 programmes and training providers who can work with teams (physical not the software) across the school. The key to 1 to 1 is it’s not just a technical or procurement or training conversation. It’s all of them and much more. https://pulse.microsoft.com/uploads/prod/2021/03/one-one-devices-and-learning-_.pdf