1. Tutoring: The article suggests that teachers can earn up to $100 per hour by offering private tutoring services, either in-person or online. This can be a lucrative side hustle, especially for teachers who excel in certain subjects or have expertise in test preparation.

2. Selling Lesson Plans and Educational Resources: Teachers can create and sell their own lesson plans, worksheets, and other educational materials on platforms like Teachers Pay Teachers. This allows them to monetize their hard work and share their expertise with other educators.

3. Freelance Writing: The article highlights the opportunity for teachers to earn additional income by freelance writing for education-related publications, blogs, or websites. This can involve writing articles, creating content for curriculum materials, or even ghostwriting for other professionals in the field.