Needles/Syringes/Routes?etc

Hi Everyone!
I really need some help with this. I am in a full time LPN program. Missed a day of Pharm I had a beautifully well timed cyst rupture last Thursday evening..... LOL! So I missed my notes on this and I have my very first pharm test on Needles.Syringes. Routes and I have no idea, I am so overwhelmed and confused. I have always found help here and I would have never passed one single A&P exam if it wasnt for this site so here it goes lol.
I know SubQ, IM, and ID. I know the parts of a syringe.
Nowwwwww where, how and which do you choose for what. Also IV piggy back???? UMMMMM not really sure whats going on there. LOL.
Is there a website with pics of syringes maybe even a video. Im so overwhelmed. Test is this Friday morning. So if I pull two all nighters I think I can pass this..... we only have three exams so if I fail one test I am in big trouble.
Thanks
Tara Overwhelmed LPN student