A few years ago I found a poem online. I'm not sure exactly where I found it, but I've been using it for years. I love the wording in the poem and it is exactly how I feel when "letting my little ones go" at the end of a school year.
I always put it with their end of the year report cards. I have had several parents say how much they enjoy the poems.
Here they are for you. One is for boys and one is for girls. I hope they speak to you as much as they do to me!