Logarithms can probably be taught using logarithmic Cuisinaire blocks, which might be presented along with suitably scaled graph paper. (You remember Cuisinaire

Logarithms can probably be taught using logarithmic Cuisinaire blocks, which might be presented along with suitably scaled graph paper. (You remember Cuisinaire blocks from primary school - they're in lengths of 1, 2, 3... and they're all different colours.) I haven't tried this yet in teaching but it's the next thing I'll try. P.S. The primes assume their proper importance in arithmetic using logarithmic blocks.