Build Guide by Miro
Here a Haste / Crit Build for Teemo...
You need to take solo mid for farm and level fast. Harras the enemy in lane using Move Quick and Binding Dark; so you can take easy a first kill with the large range of Teemo.
Place Noxius Trap in the brush and when escape from enemies, try to keep them on it...
I suggest to place a trap in in front of the Baron, so you can gank enemies when they try to kill Baron.
Try to camouflage in the lane and take enemies from behind...