4 votes

Comparison of two ways to introduce translation to 12-14 year olds

My recommendation is to show both concepts, but with the pictorial representation of vector addition more as "motivation". Of course, even before doing that, you ought to start even simpler ...
non-expert guest's user avatar
3 votes

About a difficult exercise for 12 years pupils

The exercise is part of the chapter Symmetry... Is the proof mathematically correct? What about its relevance to twelve-year-olds? The proof seems fine, but I think there is a more intuitive way to ...
Justin Skycak's user avatar

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