There are a number of similarities between writing a research article and preparing
teaching materials.
The teaching materials must gain – and hold – the interest of the students. When
you start to speak you have about 15 seconds to get the attention of your audience and
convince them that what you have to say is worth listening to. Many teachers (perhaps
most teachers) will have had the demoralising experience of losing their audience at the
beginning of a lesson and then being unable to win them back. There are strong parallels
for a research article.