There are tons of great free math teaching resources on the internet. Here are a few of my favorite go to resources that I use on a regular basis in the classroom!
Skill Building Worksheets: These websites offer free skill-focused worksheets that are helpful for those times we need some focused skill building work for our students if they are struggling with a particular skill.
Student Online Practice and Videos: Students often need and want more practice. Extra resources and tools are always helpful to have on hand!
Common Core Standards:
Mathematics Standards (common core)
Illustrative Mathematics Content Standards (tasks and other resources for each standard)
Standardized Testing: Materials and resources to help you prepare your students for standardized testing.
Advanced Placement Courses Resources: Test specifics and practice exams for your AP classes.
AP Statistics: The Exam (collegeboard)
AP Calculus AB: The Exam (collegeboard)
Interactive Tools: These tools are one way to provide for student exploration and investigation in the classroom.
Desmos Classroom Activites (desmos)