Here's an example of a short and sweet (emailed) interview thank you note high school students can keep in their back pockets when applying for jobs. This can be used as part of a lesson where you explain that although the note itself isn't important per se, it's the thought that counts. If another applicant sends one and you don't and you're neck and neck, why not put yourself ahead. This can also lead to a greater discussion on interview etiquette and "playing the game" to get the job. Have students write their own version to practice.