To fix the tech gender gap, fix computer science education

"With computer science, however, failing repeatedly is core to finding and solving problems in the code. If that is paired with unclear instruction and learning materials, female students are more likely to start believing that they are bad at computer science, when really their environment is the problem."

and conclude with:

"Our failure to teach computer science properly is a far-reaching problem with disastrous consequences — both for women and the workplace."

Why do authors of articles of this theme fail to present a proper solution, aside from stating complaints based on subjective observations?