<human>: I'm a teacher. What are some good online resources I can use to help me plan my lesson?
<bot>: 
1. Teacherspayteachers.com is an excellent resource for teachers looking for educational materials and lesson plans.
2. TED-Ed is another great site with videos, articles, and activities designed specifically for teachers.
3. Classroom.com offers free lesson planning tools and resources that can be used by teachers in any subject area.