Times tables are the cornerstone of mathematics and are a lifetime investment. We used to learn them since the early years in primary school. Still it is always a surprise to see so many children (and adults…) not mastering this very basic knowledge.

There is a common misunderstanding in considering the times tables as a long list of multiplications difficult to memorise. Actually, there are only 36 unique combinations to learn, and most of them can be deduced from the easiest ones. For example, if you know \(2×5=10\), you definitely know \(8×5\) which is simply \(4×2×5=4×10=40\). And if you know \(8×5\), you know \(5×8\) as well by symmetry. Because of this multiplication fact, only half of the times tables need to be learned. Additionally, most people know already the times tables up to \(5×5\), which represent 25% of all times tables, without even noticing!

Are 36 combinations to much to memorise? You must believe in the extraordinary capacity of the brain. Do you know that children from grade 3 onward learn 2000-3000 new words a year (ref. Biemiller; Nagy & Anderson)? That is 6-8 new words a day in average. By comparison, if you learn 36 combinations in 9 days, it is like learning 4 new words a day. By practising 10 min a day for 9 days, you can master all the times tables in 90 min. How easy it is!

You can get the full lesson plan with exercises or a free version and start the journey. Times tables are arranged by difficulty level to optimise their memorisation. They are incremental, i.e. only a few new combinations are introduced in each step. No more wasting time with the symmetric forms that will be assimilated naturally by practising the included daily worksheets.

To publish maths, you must be a registered user. The registration is free. After confirmation, you can start straightaway creating exercises from the Publish page and publish in our Open Maths Library. The exercises must be composed in English, address the primary grades K-6, respect the copyrights and differ from what is already provided in the other engines.

Use the Maths Editor to enter the questions/answers to the exercises in plain text, which may contain declarations for images and maths expressions if needed.

Images must be tagged as <img src=filename width=value height=value> with the optional width and height as the maximum output dimensions in centimetres, for example: <img src=image.jpg width=3 height=2>. The corresponding image files (in jpg or png format) must be uploaded accordingly.

Maths expressions must also be tagged as <tex>\(maths\)</tex> and follow the LaTex maths format (inline mode), for example: <tex>\( \frac{1}{2} \)</tex> to represent the fraction \(\frac{1}{2}\). But you don’t have to worry much since we will make things right for you during the review process.

You can eventually create a containing package and assign the exercises to should you wish to specify a price, otherwise the default price applies.

To insure the quality of our Open Maths Library, we will review your exercises shortly after their submission. If all are fine, they will then be published. The sales can be checked in your account. We charge a small commission on the sales. Every time you reached $100 net of sales, the fund will be transferred automatically to your indicated bank account.

Enjoy and good luck.