Here is additional information I’ve received about donating school supplies:
White Samds started a program called Smile for a Child where school supplies can be donated. They have adopted a local school. You can bring pencil, eraser, sharpner, ruler, crayons, etc.
https://www.whitesandsjamaica.com/smile-for-a-child/
I will take the advice from this forum and pack original receipts for these supplies just in case Customs might have questions.