If you want your author score to go higher, then the first thing you should do is make your individual hub's scores collectively go higher by making them the most well thought out, well written, and visually attractive web pages possible.
My advice is 1,500 -3,000 words with various text capsules titled with keywords, various high quality photo capsules titled with keywords, link capsules leading to very reputable websites (no more than two to any domain)...you guessed it, titled with keywords.
Maybe a video if you can find one that is highly relevant,....titled with keywords.
Following perfecting your hubs, you only need to interact in the community here by reading and commenting a lot of hubs, flagging the bs that isn't fit for your daughter to read, and voting things up that you enjoy and though was done right, well, and good.
Leave THOUGHTFUL comments - no "hey, great hub dude!" - that jazz won't make the symphony.
I also fully endorse anything said by Mark Ewbie should and when he ...oh wait, there he is now, and I was right!