Top >10 Mathematics Websites for Students

One of the most popular posts on my blog for teachers is Top >10 Mathematics Websites. It struck me that it might be useful to think about my top recommendations for students. Using some categories here again gives me the excuse to mention more than 10! All these resources are free to use.

Desmos Art

Francesco Bondi’s art work on Desmos. Click the image to see the graph on Desmos.

For an online graph plotter try the excellent Desmos graphing calculator, it is very easy to use and allows you to save your graphs if you sign up. (Facebook is one option you can use to sign in to Desmos). You can see more examples of Desmos graphs here and there is a helpful user manual you can download from Desmos. There are many creative users of Desmos, have a look at the selection of art work!

For checking your work WolframAlpha is so useful, it is free to use for as many queries as you want; additionally with free use you can get step-by-step solutions for three problems a day. The set of  slideshows here show you the syntax for a variety of queries. For more calculators and tools, try this collection.

There are many sites with useful notes and examples online for all ages, you will find several on the Notes pagethis Evernote shared notebook, Mathematics notes includes many links, several universities have very helpful resources which they have made available to all students. You do not have to be an Evernote user (though I’d recommend it highly), just select ‘View’ to access the notebook.

For reference materials see the various resources on the Reference page which includes links to online dictionaries.  

If you like to watch videos to help you learn then you may find some useful resources on the Videos page.

The best way to learn Mathematics is of course to do Mathematics and there are some excellent sources of problems for students of all ages to try. On the Challenges page you can see resources such as the UK Maths Challenges, Nrich, and Brilliant. Signing up to Brilliant (including an easy option for sign in for Facebook users) will allow you to join an international community and get free weekly, personalised problems. Questions at various levels are available. (See this post for further information).

Building houses 2

Wisweb Applet – Building houses with side views

Continuing with the theme of doing Mathematics, applets can help you explore the subject. Try some of the Wisweb Applets, see for example these challenging Plans and Elevations applets. On the notes page I have mentioned Craig Barton’s site, also from Craig you could try his Autograph activities (which only require the free Autograph viewer to work). Ron Barrow has an extensive collection available for you to try on Waldomaths. You could for example practise solving equations (note the 5 levels of difficulty) or older students could try the resources on Matrices, Complex Numbers or Polar Coordinates available in his Further Mathematics collection.

We all like to play Games, many games are available to help you practise Mathematics, you can see a whole collection on Mathematics Games. See for example

maths careers

From Maths Careers – make a badge!

Are you wandering what mathematicians do or are thinking about a career in Mathematics? Aimed at anyone from age 11 to adult the Maths Careers site will answer your questions.

The Maths Careers site offers you many articles to read, for further reading materials try Plus Magazine from The Millennium Mathematics Project – University of Cambridge or perhaps Math in the News from the Mathematical Association of America or Mathematical Moments from the American Mathematical Society.

Obviously all these sites are those that I think are particularly good, I do know that many of my students use a lot of the sites I have mentioned here. You will find many more recommendations on the Useful links pages. Students do let me know your own particular favourites.

Brilliant

Signing up to Brilliant (including an easy option for sign in for Facebook users) will allow you to join an international community and get free weekly, personalised problems. Questions at various levels are available, from problems suitable for younger students: (click the images on this post if you wish to go to the problem on Brilliant)
Brilliant BIDMAS
to this..

brilliant Sum over Possible Cubics

or perhaps this..
Brilliant problem

To improve your problem solving skills you could try the Techniques Trainer. For those of you who participate in Mathematics challenges you may well find this a valuable resource.

Inequalities

Experiment with these inequalities on the Desmos graphing calculator.

For further Desmos examples see Explore Straight Lines and Explore Graphs.
Notes
You may find the following notes helpful in understanding Inequalities
From Craig Barton – some very clear notes aimed at students aged 11-16
From David Smith’s The Maths Teacher, the A Level section (age 16-18) includes a video and exercisess on Linear and quadratic inequalities (under Algebra AS Level)
From Tony Hobson’s Just the Maths aimed at older students, see Inequalities 1 and Inequalities 2 which progresses to absolute value inequalities
More examples on the Desmos Graphing calculator are available on the Explore Graphs page.
@Desmos on Twitter have provided this wonderful example of art work which uses inequalities.
Sun Sets in the mountains

Sequences and Series

Can you continue this sequence?!
2, 4, 6, 30, 32, 34, 36, 40, 42, 44, 46, ….

You will need to think outside the box for this one!

To identify an integer sequence try the Online Encyclopedia of Integer Sequences.

Simply type in your sequence and choose Search.

Note that you can list, graph or even listen to the sequence!

There are further links at the foot of the page, try Puzzles for some unusual sequences which includes the sequence above.

You can also use WolframAlpha, simply type in your the sequence, scroll down the page for this example and you will see a possible sequence identification.

Typing Sequences into WolframAlpha shows several possibilities for queries on sequences.

Several of the resources mentioned on the notes page include examples of sequences, see for example the Math Centre resources on Sequences and Series. Many students find the ‘Quick Reference’ guides useful. Tony Hobson’s ‘Just the Maths’ – section 2.1 is on Series, this includes clear notes and examples and exercises. Younger students will find Craig Barton’s notes useful or the Interactive exercises from the Centre for Innovation in Mathematics Teaching (see Unit 10).

For more on WolframAlpha see the WolframAlpha pages.

Send a math-o-gram ...

Reblogged from Mathematics, Learning and Web 2.0:

Click to visit the original post
  • Click to visit the original post

...to the one you love - or any of your mathematical friends!

Choose one of the supplied romantically mathematical designs, add a custom message and send it off! Being a Desmos math-o-gram there's more - using the slider, the hearts on this design will dance! (Click on the image).

Sending Valentine good wishes to mathematicians everywhere!

....and in case you have not used Desmos before you might find some of the posts on this page useful.

Trigonometry Resources

Graphing sine function

I wrote an earlier post on some Trigonometry resources. To learn more about Trigonometry including graphing the trigonometric functions and how they are defined for angles greater than 90° try these applets from John Page’s Math Open reference. There are graphing applets for sine, cosine and tangentNote that you can drag point A to alter the angle and see how this relates to the graph; try Progressive mode to see the graph develop. Choose the Full screen option for a very clear display.

You will find many other excellent applets on this site, see the full index here.

Trig equation

This Evernote shared notebook shows the three trigonometric functions plotted with the Desmos graphing calculator. You could use these to solve simple equations like sinx = 0.2 for example. Simply adjust the slider then click on the points of intersection.

Happy New Year!

Happy New Year
Happy 2013  (using geoGreeting) (Click on the image).

Time for some new year resolutions for Mathematics students!

Remember the ten eleven commandments!

To elaborate a little more on some of these:

5 – looking it up – there are several excellent resources online for you to look up definitions or find extra examples. Never rely on just one source if you are finding a topic tricky, it can be helpful to see explanations written by different authors.

9 – if you want to practise your arithmetic you could play some games!

10 – on writing the language of mathematics correctly – see  this guide on Writing Mathematics from the Mathematics Learning Support Centre at Loughborough University and from John Kerl some excellent tips for mathematical handwriting, many of these tips these apply to students of all ages – do you distinguish carefully between a 1 and a 7 for example? Perhaps it is hard to tell whether you have written a 2 or a z or perhaps your 5s look a bit like a letter s?

Some more thoughts for you.

If you are trying to get organised generally then some of the resources on this page might be useful. I recommend Evernote highly (it’s free).

Wishing you all a very happy and productive new year!

Lots of lovely puzzles!

set game 231212

There are many excellent puzzle sites freely available, have you seen the excellent Set Game from the New York Times? How many sets can you find? Click ‘How to play’ in the menu on the left for the rules. A new puzzle is set every day.


Other favourite puzzle sites are provided here on Mathematics – Games. Erich Friedman’s Puzzle Palace site for example includes numerous mathematics puzzles.

Another great collection comes from Simon Tatham, I have been enjoying his ‘Untangle’ puzzles; note that it is possible to change the number of nodes – use the Type menu.

You may be familiar with Suduko and Kenken type puzzles, have you seen Rogo?

Wishing students everywhere a very Happy Christmas. Good luck with any examinations you may have early in 2013.

Happy Christmas!

Desmos Christmas tree

(Click on the image to go to the page).
Why not get creative and use the Desmos graphing calculator to produce some Christmas art work? As you can see the tree above, featured in the Desmos Staff Pics: Creative Art is simply a collection of line segments and circles. You can see from the syntax that it is very easy to restrict the values for x (or y). For any students unfamiliar with the equation of a circle you will see that (x-a)2+(y-b)2=r2 is a circle, radius r, centre (a,b). To experiment with circles, try this page or click on the image.

Desmos Circle

If you are counting the days till Christmas WolframAlpha will of course help you or use an Nrich advent calendar, two are available one for primary and one for secondary school students. These provide activities for each day in December. For another advent calendar see the Plus Magazine (always an excellent read) 2012 advent calendar.

Wishing you all a good end of term and a Happy Christmas.