Mathcracker: Free math help for students and teachers

logo-small.jpg is a cornucopia of math tools, calculators, solvers, and tutorials all in one
place that is a one-stop solution for the vast majority of math calculations and operations that
the student or professional needs to perform, whether for assignments, theses, reports, or
professional documents. The tools run the gamut from basic to advanced math calculations,
with 120 tools and growing. The solvers, graphing tools, and “math cracks”, which are
Mathcracker’s signature form of plain English tutorials, are all accessible from an easily
navigable menu bar with drop down menus. The number and high quality of the tools are
quite impressive, and all the tools are available for free!

To give an idea of the range of tools you can choose from, starting with the categories of
algebra, calculus, statistics, or probability calculators, you are then led to a variety of
calculators and solvers under the same category. You’ll find calculators for cross product, dot
product, permutation coefficient, factorial of a number, absolute value, algebraic expression,
angle conversion between degrees and radians, arithmetic sequences, area and volume of a
circle, cone, cube, and cylinder, and the list goes on and on. For probability and statistics,
you’ll find 11 pages of tools, including calculators for chi square test for goodness of fit,
Kruskal-Wallis test, Lamda coefficient, critical Chi square values, uniform probability
calculator, ANOVA, Cramer’s V, Z test, F test for the equality of two population variances,
relative risk, odds ratio, effect size Cohen’s d, binomial probability, and many more. There are
graphing tools for bar charts, box plots, functions, histograms, line charts, pie charts, scatter
plots, time series, and many more. To list all the tools here would take several pages, so the
recommended approach is just to go see for yourself.

Each tool comes with clear instructions on what it does, how to use it and what information to
enter. To use a calculator or solver, you enter the information you want into the appropriate
labeled form field boxes in the calculator. Each element of the calculator is labeled so you
know what information to enter and where to type it in. Upon pushing a bright yellow
“calculate” button, you are provided with the solution along with a brief explanation of the
background of the concept you are working with and how to interpret the result. If for any
reason you did not enter the right information or you are missing information, upon clicking

“calculate”, you will be presented with a message in red indicating to you what you are
missing so you can check your information. This is really helpful because sometimes
beginners or the less well-versed in math don’t necessarily know exactly what type of
information they need to solve a given problem, so the tool nudges you in the right direction.

To understand the background of the people who created this site, according to the designers
of the site, who include PhD’s with backgrounds in mathematics, statistics, engineering, and
education, the site emerged out of a desire to make math transparent and accessible to
people from many different backgrounds, including those with strong math skills as well as
those who are not so comfortable performing high level mathematics. Currently, the site is
used by students and professionals all over the world as a cornerstone math resource. They
have been linked to by major universities, teachers’ personal blogs, and included in
classroom curriculum.

The ease of use and completeness of the tools makes them compatible with the needs of a
wide variety of people and projects, and the solution and graphic outputs are of a high quality
and can be used in reports and for educational purposes. Far and away, this is an excellent
and advantageous resource for anyone who needs to perform calculus, algebra, statistics or
probability calculations for nearly any conceivable purpose, and can replace many of the
functionalities of other proprietary software programs.

FREEBIE Resource Clock faces at Hourly intervals



Just a quick free resource we created you can download right now...

TEACH TIME⏳ - , BUILD TESTS or copy and paste into ANYTHING YOU WANT with this FREE set of super high quality, 300 DPI, 8 inch clock faces. At 290 images, you’ll never have to search for that exact clip art again. **THESE ARE LICENSED FOR FULL COMMERCIAL USE

Click here to download this FREE resource


⭐ Clock Face / Time Clip Art (5 Minute Intervals) 290 Graphics for commercial use

These 290 IMAGES are spaced at 5-minute intervals covering all 12 hours. We have also included a blank clock that you can customize yourself. These were professionally designed for quality and size, so you can blow them up to a full-sized PowerPoint with no pixilation and no loss in quality.

Learn computer science through Pixar and the Khan Academy

Finding Dory represents nearly thirty years of innovation and computer science.

Finding Dory represents nearly thirty years of innovation and computer science.

In 1995 Pixar reinvented animation as we know it when they released Toy Story.  Nowadays it is hard to find an animated film that is not built upon a digital animation process.

What many of us fail to understand is the marriage of art, science and technology required to bring these films to life.  There are some incredibly complex technical and artistic challenges which have spawned an industry to deal with making magic come to life through the use of computers in animation.

Pixar have partnered up with the Khan academy to produce a course that aims to introduce secondary students to the world of digital animation and let them use interactive online tools to deal with the challenges and solutions involved in this process of film making.

Whilst Pixar films are generally aimed at a younger audience I can guarantee you that most of the concepts dealt within this course are way beyond that of any elementary student.  This is really aimed at the tween audience with skills in the area of maths and computer science.

It is a shame there is not a simplified course for juniors but I will continue to live in hope...

Take a look at the course for yourself here,

OSMO links tangible objects to the iPad for new learning opportunities.

OSMO is an innovative add on for the iPad that allows you to use tangible objects instead of the screen as an interface between the user and software.  If you check out the video above you can see it in action to get a better idea of how it operates.

This add on allows for a range of new opportunities that can be applied to education.  

Right now, the company has three different game sets that work with corresponding apps for iPad:

  • Tangram: This old-fashioned Tangram game brings back a wave of childhood memories.
  • Newton: Newton is a drawing app slash obstacle course.
  • Words: This is a Scrabble-like game that asks you to guess the correct word based on the letters you see on the screen.

All of these games include brightly colored, physical toys that connect in real-time to the apps on your iPad.

This product is currently in it's infancy and has proved to be a very popular crowd funded product.  You can get on the order list

I would imagine within a year or two we will see this product mature and expand to assist students through the use of using their hands and toys in a more traditional manner than simply doing everything through a screen.

Full details can be found here.



Awesome clock to teach students maths concepts

I came across this idea from Wanda Terral and it is a real winner.  Create your own equation clock to both help students with their understanding of Algebra and time.  Students could also take ownership of this project too. 

You can create one of your own by ordering a cheap clock like the one below and then just using paper circles to add you equations and style.

I'd love to see some pics of your ideas...

How to teach equivalent fractions to elementary students

Equivalent fractions are fractions that represent the same value or fractions that represent the same part of an object.  Using various examples, this unit will assist students in grasping the concept of equivalent fractions. Pictures and diagrams are included that will greatly enhance
understanding to your students.

Please use the slideshow above to assist you in teaching equivalent fractions

This lesson was submitted by Piyush Bhakar - If you wish to sell us your lesson plans take a look here.

Topics covered in the given unit are:

  • Definition
  • How to find equivalent fraction
  • Methods to find out equivalent fractions
  • Examples
  • Comparison of equivalent fractions

Teaching math's through Charlotte's Web

This activity allows students to think about how science is represented in E. B. White’s novel, Charlotte’s Web.  Students will explore the identities of different species that present in this treasured children’s novel.  They will use their knowledge of the food chain to determine where different animals fit into the food chain.  This requires critical thinking and allows the students to look at the novel from a unique scientific perspective.

Click here to download the entire lesson plan and resources

Winter time math word problems

Students really enjoy the opportunity to solve math word based problems as it places maths in a context that is real to them.  I have put together a collection of winter themed maths word problems in a worksheet aimed at students aged 9 to 12 years old.  Click here to download.