Web Resources
This is one of my favorite math resources. I first learned of it in college as many of my professors used it in their lessons. It can be applied to all grade levels and the level of geometry varies from understanding simple shapes to differential equations and beyond. You can use the online version or download one on your device.
"GeoGebra is dynamic mathematics software for all levels of education that brings together geometry, algebra, spreadsheets, graphing, statistics and calculus in one easy-to-use package. GeoGebra is a rapidly expanding community of millions of users located in just about every country. GeoGebra has become the leading provider of dynamic mathematics software, supporting science, technology, engineering and mathematics (STEM) education and innovations in teaching and learning worldwide." - geogebra.org
"GeoGebra is dynamic mathematics software for all levels of education that brings together geometry, algebra, spreadsheets, graphing, statistics and calculus in one easy-to-use package. GeoGebra is a rapidly expanding community of millions of users located in just about every country. GeoGebra has become the leading provider of dynamic mathematics software, supporting science, technology, engineering and mathematics (STEM) education and innovations in teaching and learning worldwide." - geogebra.org
"Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content." - Khan Academy
I was fully introduced to this site in college. There was a spokesperson who came in to talk to us and got us started on our free subscriptions. Much like Teachers Pay Teachers, everything is categorized and grade leveled. This is a site where you can find a plethora of lessons, activities and other resources to help you with any subject.
Although this resource is great for all subjects and grade levels, I find it especially useful for math. Math units can be large and it is easy to stray away from creativity when working with numbers. This resource is a fun way to stay up to date and keep the creative juices flowing. You can find a lot of free resources on this website for teachers as well as paying for some bigger downloads that teachers put a lot of time and effort into. You can even share or sell your own personal ideas.
This is a free site to use. "The TEDEd math section mixes clever graphics and occasional cultural references in with key mathematical principles to give students a fun taste of concepts they may otherwise find tiresome." - http://www.edudemic.com/top-10-free-math-resources-web/
This is a free site to use. "The site mixes videos, images, and real-world challenges that get students thinking about where math fits into their day-to-day lives. The site divides posts by age group, genre, and the type of math on display." - http://www.edudemic.com/top-10-free-math-resources-web/