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The aircraft shown are all flying at the same speed and height.
The directions they are flying are shown as three figure bearings.
Is the situation safe or are any aircraft likely to collide?
Topics: Starter  Angles  Bearings  Estimating
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Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.
Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Here is the URL which will take them to an exercise involving bearings.
Here is the URL which will take them to a game involving bearings.
Transum.org/go/?to=SnookerAngles
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Apple iPad ProThe analytics show that more and more people are accessing Transum Mathematics via an iPad as it is so portable and responsive. The iPad has so many other uses in addition to solving Transum's puzzles and challenges and it would make an excellent gift for anyone. The redesigned Retina display is as stunning to look at as it is to touch. It all comes with iOS, the world's most advanced mobile operating system. iPad Pro. Everything you want modern computing to be. more... Before giving an iPad as a Christmas gift you could add a link to iPad Maths to the home screen. 
If your pupils' ability to estimate compass bearings is not good enough for this Starter you may want to instead begin with this. It's a whole class practice/learning activity that could be played as a game.