r digits are picked at random (with replacement) from the set $\{0,\;1,\;2,\ldots,\;n\}$. Probabilities that 1) all $\lt k$, 2) largest is $k$?

Uses JSXGraph to generate a plot for a cubic, with given critical points, along with three other incorrect graphs with modified properties. JSXGraph code is commented.

An example of using the GeoGebra extension to ask the student to create a geometric construction, with marking and steps.

35 simple subtraction questions are given with a 2 minute time limit.

Finding the lengths and angles within a right-angled triangle using: pythagoras theorem, SOHCAHTOA and principle of angles adding up to 180 degrees.

A randomised table is contained in a div tag with the id #sales-table, so it can be styled using the CSS preamble.

A randomised table is contained in a div tag with the id #sales-table, so it can be styled using the CSS preamble.

No description given

Fiddling about with a new extension providing a "quantity" data type: an amount with units.

Finding the lengths and angles within a right-angled triangle using: pythagoras theorem, SOHCAHTOA and principle of angles adding up to 180 degrees.

Real life problems with differentiation

Two quadratic graphs are sketched with some area beneath them shaded. Question is to determine the area of shaded regions using integration. The first graph's area is all above the $x$-axis. The second graph has some area above and some below the $x$-axis.

Calculate and work with measures of central tendency such as mean, median and mode, and measures of spread such as range and standard deviation.

Two quadratic graphs are sketched with some area beneath them shaded. Question is to determine the area of shaded regions using integration. The first graph's area is all above the $x$-axis. The second graph has some area above and some below the $x$-axis.

Two quadratic graphs are sketched with some area beneath them shaded. Question is to determine the area of shaded regions using integration. The first graph's area is all above the $x$-axis. The second graph has some area above and some below the $x$-axis.

Finding the lengths and angles within a right-angled triangle using: pythagoras theorem, SOHCAHTOA and principle of angles adding up to 180 degrees.

Two quadratic graphs are sketched with some area beneath them shaded. Question is to determine the area of shaded regions using integration. The first graph's area is all above the $x$-axis. The second graph has some area above and some below the $x$-axis.

Finding the lengths and angles within a right-angled triangle using: pythagoras theorem, SOHCAHTOA and principle of angles adding up to 180 degrees.

Finding the lengths and angles within a right-angled triangle using: pythagoras theorem, SOHCAHTOA and principle of angles adding up to 180 degrees.

This question shows how the number entry part marking algorithm has changed to award credit when the student gives the correct answer but to too much precision, when the precise value is not included in the rounded-off range of acceptable answers.

See this issue on GitHub.

Finding the lengths and angles within a right-angled triangle using: pythagoras theorem, SOHCAHTOA and principle of angles adding up to 180 degrees.

A cubic with a maximum and minimum point is given. Question is to determine coordinates of the minimum and maximum point.

A collection of questions on working with units of measurement, mainly in the SI/metric system.

Several 'real-world' examples.

Some questions on working with surds.

Calculate and work with measures of central tendency such as mean, median and mode, and measures of spread such as range and standard deviation.

Work with measurements of weight, mass and density.

This custom function draws a tree diagram with a random number of branches (branch1 and branch2).

Graphs are given with areas underneath them shaded. The area of the shaded regions are given. From this, the value of various integrals are to be deduced.

Graphs are given with areas underneath them shaded. The student is asked to select or enter the correct integral which calculates its area.

Students are presented with two random integers to add together. They are ieach n the range -10 to 10.