The Internet archives the world's knowledge. Students can find essays or test answers for any subject imaginable. Knowing that the correct answers are readily available online can prove far too tempting for some students, which leads to academic fraud, plagiarism, and rampant cheating. Educators have taken steps to counter such practices. They have developed sites that check essays and research papers against published content to detect pilfered material. Determined students may attempt to circumvent such safeguards by using social media and message boards to share class information. This contributes to culture of cheating that didn't exist on such a scale before the Internet.