# What’s new? December 2021

2019-20: Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug

2020-21: Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug

2021-22: Sep | Oct | Nov

#### GeoGebra applets

##### Exponential growth and decay

This applet has been added at R16a. The applet allows you to generate questions involving exponential growth and decay, and reveal amounts at intermediate time periods, not just at a start and an end point. You can reposition the arrow to show the relationship between amounts at any two time periods.You can click on the label to the right of the arrow to cycle through different information.

#### Desmos classroom activities

We have continued to add Desmos classroom activities to our Resources. These Desmos activities contain randomised questions which means that for any given tasks, students in general will get similar, but not identical, questions to each other. As a teacher, you can quickly see the type of questions that students are seeing, but you can also dig deeper to see the specific question that each student sees. The video below shows the mobile phone screen of a student working through a task (on the right) and the teacher’s dashboard view (on the left). Whilst teachers can monitor students’ progress on a question-by-question basis during a live lesson, you don’t have to do this in real time. You can simply check how students fared at a later time, if you wish. This makes these activities suitable for use as homework tasks.

Where available, you will find links to these Desmos classroom activities in the expandable Teacher resources boxes under a topic’s set of slides.

#### Delta exercises

We have continued to add Delta exercises to a few topics, to follow on from the Alpha, Beta and Gamma exercises.