These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.

Tree Diagrams

The first two interactive sheets deal with selecting objects from two bags. The outcomes are shown on tree diagrams and the probabilities can be revealed.

The next interactive sheet deals with the problem of passing through two sets of traffic lights with sets of questions beside the tree diagram.

The last interactive sheet is about the problem of sitting the driving test, and having up to three attempts where the probability of passing decreases after each attempt.

There are also eight sheets of questions which may be suitable for use in the classroom.


This program was designed by be viewed on a screen with a resolution of 1024 x 768. Users may have to adjust the resolution of their screen for the pages to display as was originally intended. The program uses macros which need to be enabled on users' machines.

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