Proof of Sum of Geometric Series: steps in proof of the Sn formula. Pupils need to cut out the steps and rearrange them into a full proof.
Essentially the same as the NRich interactive resource http://nrich.maths.org/1398 but this was too small to see on my interactive board and I wanted everyone to have a go so made a paper version.
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Thanks.
Thank you so much...this has just saved me so much time! Fabulous resource.
thanks this is exactly what I was looking for.
This is a wonderful idea for an introduction to proof at KS5, students have to organise the steps in to the correct order and so gain an understanding of the rigour needed to complete a proof. This would make an excellent starter activity when you are studying the formula for the sum of geometric series. Thank you for sharing.
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