[Sparrowhawk21]

"Write smartly" is normal to me as a speaker of British English. That's not to say the alternative shouldn't be preferred though.

[dunefox]

> Create courses and learn Smart!

"What's 'Smart' and why do I need to learn it?"

[anigbrowl]

British people dress smartly and often act smartly but I've never heard anyone say a a book was written smartly, if you see what I mean.

[Sparrowhawk21]

They'd probably say "smartly written". But of course that wasn't the original phrase. My point was solely that it's not strange to us.