If it's for this summer she's left it very late I'm afraid.
Get a CV together, it doesn't have to be long, she can just put subjects she's doing at school, any after school activities and jobs around the house. Then look at companies locally, find a suitable named contact (from the website) send them a letter and CV, paper letter in the post, include an email address so they can reply. Expect to send LOTS. Most won't get a reply (as I said, left very late) but she might get lucky. She doesn't need personal connections although they always help. Oh, and contact should be made my her, not you. It always looks better if the student does the legwork themselves.