This is my very first time making a build for Teemo

Ok i basicly made this guide/build for a AP teemo because it worked out very well and very easily for me, and i'm not the best player on the planet so it might be working even better for you as a (skilled) Teemo player.

When the game launches, i normaly buy Amplifying Tome and a Health Potion

As starting ability you can choose between Blinding Dart your Q spell or
Toxic shot Your E spell this depends on wich enemy champions you are up against as if it were melee champions you want to take your Q first, if it is ranged champions you want to take yout E first.

later in game i normaly upgrade the Amplifying Tome to a Nashor's Tooth ofcourse after i got my Sorcerer's Shoes (you can buy Ionian Boots of Lucidity wich decreases the passive cooldown on you Mushrooms

Mid Game i continue building AP And Attack Speed by buying Malady afterwards (to increase my health-pool) you (can) buy a Rod Of Ages it's not normally what i do but if the opposite team got fedd and makes a whole lot of damage you might be interrested in buying it...

If you do get a lot kills by now you can buy a stack item like: Mejai's Soulstealer to increase your ability power even more

Late Game Late game, if the case aint that you got many kills and therefore haven't bought Mejai's Soulstealer or if you think your health pool is just fine, you can buy a Rabandon's Deathcap and afterwards the Frozen Mallet for even better kiting of the enemy champions

IF you are playing against Karthus it might be a good idea to buy Zhonya's Hourglass simply to avoid getting hit by karthus's ultimate (wich will deal a big ammount of damage on a non magic ressiting teemo)