Sorry to try to pick your brains on here, especially over the holidays.
I've got some material to send out to secondary teachers. It is genuinely useful / important, very much not spam or marketing junk. However, we're worried that the envelopes will get lost in the mass of post.
Is there anything we could do that encourages you to open an envelope, rather than put them to one side? We have the charity's logo on the envelope, for example, and we have a choice of white and brown envelopes.