Online education company Chegg is laying off 319 employees, 21% of its total staff, and said it expects to fall short of its previously announced financial targets for next year as artificial-intelligence tools continue to eat into its online homework solutions business. Chief executive Nathan Schultz said the popularity of products such as ChatGPT and the introduction of AI summaries in Google search were weighing on Chegg’s revenue expectations. The company, whose stock has fallen 99% since 2021, has already been impacted by students turning to ChatGPT and other AI chatbots rather than paying for study help from Chegg.