Resources

Khan Academy has thousands of videos explaining topics from a wide variety of courses in math as well as many other subjects.

There are plenty of practice exercises to test your skills.

Other sites that students have told me they find helpful

• FlippedMath.com, well-organized by course and includes practice exercises and solutions.

• PurpleMath.com

• PatrickJMT Channel on YouTube

GeoGebra is a FREE "dynamic geometry software."

CREATE your own constructions. Don't be intimidated if it doesn't seem intuitive at first -- it's definitely worth the effort to learn some of its basic functionality. Even for math subjects that I thought I knew quite well, I found that through using GeoGebra I gained more insights and connections to other topics.

EXPLORE constructions made by others. There are plenty of wonderful resources made be students, teachers, and Math fans from around the world.

My GeoGebra contributions are here on the GeoGebra site, or some of them have been organized here, with brief descriptions of each one.

Desmos is a FREE web-based graphing calculator. In many ways it can be seen as an alternative/competitor to Geogebra. I got hooked on Geogebra long before Desmos came along, but new users may find Desmos to be more user-friendly.

Unit Circle Practice

GeoGebra version: New in summer 2020, to replace the original Flash version. Works on wide variety of computers/devices. This resource will be used both for practicing your unit circle skills and for administering the unit circle test.

Unit Circle Practice (Old-timey version using Flash, which was once a cool internet technology)

I made this program in 2010 to help students become proficient in evaluating trigonometry functions for angles on the x-y plane. It's the best practice tool for this purpose I've found on the web, if I do say so myself.

Desktop/Laptop version: This is the best version to use. Flash Player plug-in is required. If you don't know whether you have Flash installed on your desktop/laptop, you probably do. This version also works on Chromebooks or any other portable device that supports Flash.

Mobile Device version: If you have a device that doesn't support Flash (such as iPhones and iPads), use this html5 version. I've verified that it works on an iPad and iPod Touch, but it should work on other non-Flash-supported devices too. This version may seem less responsive than the original Flash version if you don't tap the buttons quite right. Try to tap each button at a right angle to the screen, being very careful not to slide your finger at all while tapping. Also, if you tap multiple times on any button too quickly, it will cause the page to zoom in/out.

Download to your computer: For a standalone file that runs without a web browser or internet connection, download and unzip this for Windows or this for MacOS. Additional benefit is that Flash Player does not need to be installed on your computer to run this program. Upon opening the first time, your computer may give you a warning about virus risks. Go ahead and allow the computer to proceed -- I promise I'm not trying to infect your computer.

Unit Circle Angles

I made this program in 2010 to help students learn to identify angles on the x-y plane and convert quickly between degrees (lil' kid angle measure) and radians (grown folk angle measure).

Desktop/Laptop version: This is the best version to use. Flash Player plug-in is required. If you don't know whether you have Flash installed on your desktop/laptop, you probably do. This version also works on Chromebooks or any other portable device that supports Flash.

Mobile Device version: If you have a device that doesn't support Flash (such as iPhones and iPads), use this html5 version. I've verified that it works on an iPad and iPod Touch, but it should work on other non-Flash-supported devices too. This version may seem less responsive than the original Flash version if you don't tap the buttons quite right. Try to tap each button at a right angle to the screen, being very careful not to slide your finger at all while tapping. Also, if you tap multiple times on any button too quickly, it will cause the page to zoom in/out.

Download to your computer: For a standalone file that runs without a web browser or internet connection, download and unzip this for Windows or this for MacOS. Additional benefit is that Flash Player does not need to be installed on your computer to run this program. Upon opening the first time, your computer may give you a warning about virus risks. Go ahead and allow the computer to proceed -- I promise I'm not trying to infect your computer.