Here I will have pictures of certain skills, done correctly and incorrectly, and point out the mistakes and corrections (as I see them LOL). The correct skill will be on the right and the incorrect on the left.

Handspring tucked-front vault Handspring tucked front-full vault Tucked Rudi vault Handspring front pike vault Handspring front layout vault Polozkova (layout Cuervo) vault Phelps vault Tsuk double full vault Yurchenko-full vault Hristakieva vault Yurchenko 1 1/2 vault Yurchenko double full RO 1/2 on, tucked Rudi off vault	Cast handstand-1/2 turn Free hip hecht Free hip hecht-1/2 Giant-full Giant 1-1/2 Bail to handstand Pak salto Jaeger Piked Jaeger Gienger Tkatchev Stalder-Tkatchev Comaneci salto Endo in L-grip Double pike flyaway Double front 1/2 flyaway Double front flyaway
RO FF mount Front on mount Straddle jump Side straddle jump Fouette Wolf jump-1/2 Double stag ring jump Yang Bo Full turn Shoulder roll Gainer back handspring Back handspring 1/4 turn to handstand Chen Rulfova Front tuck Front aerial FF 3 layouts FF FF 2-foot layout Double tuck dismount	Front-full Double front Double front 1/2 (Podkopayeva) Whip-1/2, Tarasevich 2 1/2 twist 2 1/2 twist punch front 2 1/2 twist punch front layout Triple twist Tucked full-in Piked full-in Double pike Whip, double pike Double layout Double layout, punch front Arabian double front