"In Mrs tilchers class" explores how the children have to cope with the change from being young, innocent, and in the protection of Mrs tilchers class, which was made to feel not only like a safe-haven but a place of joy and captivation, to being exposed to the adulthood and the dangers of the outside world, which is shocking, revolting, and heavy new knowledge to learn
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"you kicked him" short sentence suggest her disbelief and fear of the unknown, and transition into adulthood. word choice empahises the agression and violence in her acts in attempt to cope with this new unkown knowledge, showing that she is still clinging on to her childishness
" you ran through the gates, impatient to be grown" parenthesis emphasises the speakers emotions and that she just wants the growth to be complete, she wants to be an adult as soon as possible, which is her own way of coping with the limbo period, between child and adult.
"You asked her how you were born." when faced with the challenges of growth and learning the unknown, she trurns to mrs tilcher becuase she want to be the one to break the knews to her