I'm looking for an itemization guide/explanation for new players- know any?

A brief google search took me to this guide by dignitas, but I don't think it's good enough for new players.

Being low elo, I tend to play with a lot of newer players that I really feel could use some help. I just finished a game against an 0/12/6 Morgana that built Warmogs. Checked out her match history and she's new to level 30 and her last ranked game she build Frozen heart on twisted fate as her 3rd item. Yeah.

I want to try to explain to her that certain items aren't as good on certain champions, that she'd have been better off building Zhonyas than Frozen Heart on TF if she needed armor. I just don't really have the words for it.

So do you know any guides?