Cool Math Sites
When I was a young man, the king of the world could not command the resources available for leaning math that anyone with access to the web now has at their disposal. But if they are not used, there is no advantage to having them. Just like a person that knows how to read but chooses not to is no better off than someone that is illiterate. The best way to to use the web for math help is to just enter the specific topic you are having trouble with or are interested in into Google, The more specific the better. For example, enter "Solving quadratic equations by completing the square." Some sites will provide a thorough explanation of the concepts, others will just focus on the algorithm, i.e., the steps involved in using the method, others will have many example problems. If you do this often enough, you can learn to quickly sift through the long list of sites to get to the information that suits you best. Try including the word "interactive" in your search, it often will pull up some kind of programmed site, maybe in Javascript, Flash, Java, or something else, that allows you to interact with the program and see the math principle explained in a way that is unique and not possible without interactivity. My experience has been that most high school students are too used to being told what to do to use this type of initiative. So parents, show them what to do and make sure they keep doing it! They will discover it quickly enough by necessity when they get to college, and they will kick themselves for wasting this wonderful resource on Facebook, Twitter, and Instagram and not using it at all for math. I do this all the time so I have listed a few that I seem to end up using a lot. Don't forget YouTube, there are a lot of great instructional math videos there!
Kuta Software makes the worksheet generators that I have used for years and use for the majority of the practice problems that I use during and between tutoring sessions. I own all the programs that they currently make, one for Prealgebra, Algebra 1, Geometry, Algebra 2, Precalculus, and Calculus. I bought the first package in 2008 so I have had time to give them a comprehensive evaluation. If you are a fellow teacher or math tutor I highly recommend these programs. They are well designed, flexible and accurate.
Students - don't wait for your parents or teachers to tell you to start preparing for college. This is your first job. No one will do it for you as well as you can do it for yourself. The tools you have available on the web are better than any student has had available in the history of the planet. But you need initiative. The will to use these tools. Don't stop there. Talk to real people, visit schools. Ask questions. When should you start? Eighth or Ninth grade. Get the application form for any college you think you are interested in from the web and start going over it to see what you can do to better prepare yourself for that school. You know the Pink Floyd song lyrics "No one told you when to run, you missed the starting gun." ? You've been told. :-)
Online Math Tools (it is ≥ 2025, try AI first!)
- Math AI:
- Math-GPT ~ includes physics, accounting & chemistry
- Mathos AI - register for free version
- MathAI GPT
- WolframAlpha
- Desmos Online Graphing App ~ click here for user guide (pdf)
- Symbolab.com
- GeoGebra Home (YouTube Channel ~ Idal Tan's Geogebra)
- Math Is Fun Math Tools and Calculators
- Geometry Constructions - Math Open Reference
- Triangle Solver at Triangle-Calculator.com
- Advanced Math Tools: (Calculus, Differential Eq., 3D Graphs) ~ click here
Free Math Lessons
- Homework Alabama - free live expert tutors, homework resources.
- Khan Academy - lessons and exercises. Simply the best!
- Mathispower4u Tutorials by James Sousa
- Kalid Azad's Better Explained Math
- Grant Sanderson's Math YouTube Channel
- Eddie Woo Mathematics
- PatrickJMT
- Dr. Trefor Bazett
- Paul's Online Math Notes
- Krista King Math
- MathIsFun.com
- SchoolYourself.org
- MathMedic
- MathBits Notebook
- Math Open Reference
- expii.com
- AndyMath
College Planning and Admissions
Juniors and Seniors, don't wait for your Moms or Dads or teachers, or tutors to tell you what to do and when to do it. Make something happen. Don't be a lazy slacker!
Vex Robotics
- Vex Robotics Company - Home Page
- EasyC by Intelitek Home Page
- Programming with EasyC-Nov. 17 Period 1 at SMHS Lesson Plan - by Mr. C.
- EasyC by Mr. C. Video - Adding the code to use a Joystick to control the drive motors.
- EasyC by Mr. C. Video - Adding the code to use a Joystick to control the arm and claw motors
- EasyC by Mr. C. Video - Adding Robot Driving Controls to Drive the Robot in a Square in Autonomous Mode
Arduino Related
Javascript Related
Python Related
Raspberry Pi Related
Numworks Graphing Calculator Related
Julia Programming Related
Mr. C.'s Geogebra Activities
- Triangle Angle Sum Theorem
- Exploring The Discriminant Inc. Complex Numbers
- Law of Sines & Diameter of Circumscribed Circle
- Circle Centers -
(shows Incenter, Circumcenter, Orthocenter, 9-Point Circle Center, Centroid, & Euler Line)
Mr. C.'s Desmos Activities
- Compare a b c and h k In Quadratic Functions
- Inverse Log Function Example
- Elliptic Curves From Quanta Magazine Article - Nov. 2024, by Joseph Howlett
("New Elliptic Curve Breaks 18-Year-Old Record") - The Unit Hyperbola
- Standard Normal Distribution
- Larson 9e Special Polar Graphs
- Damped Oscillation Example - Plus Taylor Series
- Archimedes Spiral - Polar Form
- Larson9e Ch 13.1 Example 4 Contour Map
- A System of 2 Linear Inequalities
SMath Studio
A small, free, and powerful math program that comes close to duplicating my favorite math program of all time, MathCad. True WYSIWYG math. I loved this progam for engineering calculations but many engineers had trouble appreciating the unique and intensly practical "self-documenting" nature of this program. It has been restored from the corporate death it suffered and lives again in Smath Studio! I never thought I would be using colons to define variables and quotes to start a text block again. Hooray. Check out some SMath Studio programs I wrote below to support "Things to Memorize" for the ACT. These are live and calculate top-to-bottom, left-to-right. So cool. Smath Studio has the option to store programs you write "in the cloud" and they are live and work with just a browser. The programs below should allow you to change the inputs to explore, please let me know if they don't work for you. Give Smath Studio a try yourself. If you put any Smath programs in the cloud, let me know!
- SMath Studio Home
- SMath Studio Wiki
- SMMath Studio in the Cloud
- SMath Studio Intro-Primer By G. Urroz: Intro 2012 ~ Primer 2011
- SMath Video Tutorial by E. Martin: Part 1 2022 ~ Part 2 2022
- ----------
- Quadratic Equation Solver with Graph - by Mr. C.
- List of Perfect Squares - by Mr. C.
- List of Perfect Cubes - by Mr. C.
- Equation of Line Given Two Points - by Mr. C.
- Distance Formula - by Mr. C.
- Pythagorean Triples - by Mr. C.
- Area of a Trapezoid - by Mr. C.
- Infinite Series for the Sine Function- by Mr. C.
- Infinite Series for the Cosine Functio- by Mr. C.
- Infinite Series for e- by Mr. C.
- Infinite Series for Pi- by Mr. C.
- Comparing the Infinite Series for Pi, e, Sine, and Cosine- by Mr. C.
Engineeringpaper.xyz or https://EPxyz.com:
Although this free, open source program has been out for a few years it is new to me (in 2026) and is billed (like SMStudio) as a replacement for Mathcad (yeah, Mathcad has not been forgotten!). I like it and although is seems a little harder to get started with than Mathcad (it has its own way of doing things) it looks like it might be worth the effort to learn because of a few advantages I think it has over SMStudio (which I wanted to like but we seem to have irreconcilable differences). The advantages I see at first blush are: (1) browser based, a biggie, no software to install, way, way easier when dealing with students, (2) seems to have a good capability to import and export data, (3) seems easy to save and share files (see advantage number 1), and finally, (4) the tutorials available seem comprehensive and current. YMMV.
Why two URL's? Per EngineeringPaper.xyz: "Some environments indiscriminately block all .xyz domains. For example, some school districts block all .xyz domains for their school issued Chromebooks. Since it's important to us that all of the EngineeringPaper.xyz goodness is available to everyone, the full functionality of EngineeringPaper.xyz is now also available as a .com address at EPxyz.com. The functionality is the same between the two domains and sheets saved on one can be opened on the other. Shareable links are interchangeable as well. For example, https://engineeringpaper.xyz/fFjTsnFoSQMLwcvteVoNtL and https://epxyz.com/fFjTsnFoSQMLwcvteVoNtL point to the same sheet. Enjoy.
- The Official EngineeringPaper.xyz Blog
- How EngineeringPaper.xyz Compares to Mathcad
- EngineeringPaper.xyz Keyboard Shortcuts
- Exporting Documents from EngineeringPaper.xyz
- --------
- TBD - I will put examples I made with EngineeringPaper.xyz here
Check out the math history index and the famous curves index too!