Some programming teachers think students should learn all the abstract concepts of programming and then write perfect programs. This is wrong. They should start

Some programming teachers think students should learn all the abstract concepts of programming and then write perfect programs. This is wrong. They should start with hello world, and then hello myname, and they should experiment and write programs that don't work, and after being frustrated for a little while with something just beyond their ability to solve, they should be shown the trick that solves it. Repeat until expertise.