Kata

For participant safety and to ensure proper technique is developed, Judo should only be practiced under the supervision of a qualified instructor. 

As with most sports and martial arts, you start learning the movements by going through the motions. In the case of learning with a partner, both of you know roughly what you are supposed to be doing and what is supposed to happen. This is kata (form practice). In addition to the practice you will do almost every class learning and improving your technique in this way, Judo has a number of formal kata.

Seiryoku Zenyo Kokumin Taiiku - Maximum Efficiency National physical education

Kodomo no Kata - forms for children

Nage no Kata - Forms of throwing

Katame no Kata - Forms of grappling

Ju no Kata - Forms of gentleness (or giving way)

Kodokan Goshin jutsu - Self-defense techniques

Kime no Kata - Forms of desiscion (self-defense)

Koshiki no Kata - Forms of Antiquity

Itsutsu no Kata - Forms of "Five"