かたかな is the 2nd Japanese syllabary we’ll cover. It is setup & sounds JUST LIKE Hiragana, but it used to write foreign & “borrowed” words & names of non-Japanese people. Words like  テレビ (terebi - television) &  ニコラス (nikorasu - Nicholas) will always be written in Katakana.
(かたかな (katakana) itself is written in hiragana since it is a Japanese word :P)

Don’t forget that these are pronounced just like the A & Ka lines in hiragana.

ア イ ウ エ オ
a  i  u  e  o
カ  キ  ク  ケ コ
ka ki ku ke ko

Some Words using these kana:
アルファベット - Alphabet
arufabetto

コアラ - Koala
Koara

Don’t forget to practice!  http://www.realkana.com/