Knees And Driving How Can I Train To Make Myself Better At High Jump?

How can i train to make myself better at high jump? - knees and driving

I am a woman in Gr. 9 (14 years), my height is 5'5 and I'm 110 pounds, this is my season 3 in athletics.
I drive a knee / kick Scissor 140 cm, so all ready, the vertical scroll bar, but the technique that I know shit on the bar so much, what type of packaging that you can do to white in winter, id make me a better shape for spring. thank you:]