Responses to requests
In response to requests from several subscribers, we’ve created a new topic, G20d, with resources for trigonometry in 3D, including a GeoGebra applet.
We have also updated both applets at G17f on surface area to allow you to now demonstrate with triangular prisms and square-based pyramids, as well as cuboids as before:
We have added an applet to A4e that demonstrates the “grouping” method of factorising non-monic quadratic expressions. The solution isn’t revealed all at once; rather, the slider allows the steps to be revealed one at a time. It is therefore possible to use this applet for backwards fading in class.
In response to a recent request from a fan of backwards fading: an applet that generates non-monic quadratic expressions to factorise by grouping, with full step-by-step solutions that can be revealed incrementally. pic.twitter.com/YDMcHpBJLI
— Sudeep (@boss_maths) January 26, 2020
A former colleague of mine asked if I could share an applet that she’d seen me use in the past. This is one I use after students are comfortable finding the area of a triangle using \(\frac{1}{2}ab\text{sin}C\). I tweeted the following about this applet, a slightly updated version of which is available at G23a Area of a triangle using sine:
Always enjoy this doing this with students once they can use (1/2)absinC, esp the moment they twig where this is going. Have them find the area of the first regular n-gons and then wonder what happens as we ⬆️ n.
— Sudeep (@boss_maths) January 29, 2020
Who doesn’t love those "penny drop" moments? pic.twitter.com/jPI67TKLcC
Vocabulary resources
We have started adding content highlighting the etymology of key words, creating cross-curricular links where possible. For example, students come across convection in science, and this originates from the same Latin word as vector:
TopTopics, Random Question Generators, and Skills Drills worksheets
Questions on Rounding have been added to TopTopics:
We have included quick-access sets of random question generators under the Teacher Resources for N15b and N16a.
We have also added skills drill worksheets for these topics.
Mixed-topic problem-solving
We have added more mashup and shortcut problems, available to Premium subscribers via this page. To find out more about the resources available to our Premium subscribers, click here.