Hey so before i even knew anything about the pua community about a year ago i made a lot of mistakes. There is this one girl that goes to my school. i opened very well but after that things got a little difficult and i ended up thinking she hated me so i ignored her for the rest of the school year. I'm hopping to restart with her again this school year (haven't spoke to her since last year). Does this sound like a good idea now that im more knowledgeable with the game or should i forget it?

Also if i were to go for her again how would i approach her? I mean should i just pretending nothing ever happen about ignoring her ?

if i were you, i would approach her and talk about the situation "maybe what i said came across the wrong way.... maybe we should start a new chapter... care for a coffee this afternoon....." i would try the nice way/i am sorry approach
good game
king

im not sure if thats the best idea. u dont want to come a cross as needy. who cares what happened a year ago? you're young. people change opinions and who they are all the time. just act is if there is nothing wrong.
be nice to her, give her a good time, talk is if youve known eachother for ever.

if you approach her with your apologies, she will not change opinions about you, because opinions take time to change and if she hates already hate you - she will just ignore you and not have respect for you.

play it cool - give her new positive emotions - so she can reevalute the new you.