Thank you for anyone who could help look at the following sentences and see if they are correct and approapriate!

1This rewarding experience solidified my desire to teach but also revealedhow far the students were from qualified Math learners.

2I will obtain an an open mind both to knowledge and changes, a quality seriously missing from China’s teachers.
3This class won their school a third prize of all the 42 primary schools their District, the first award it had received of Math subject.
4.A large part of my suitability to teach lies in my ability to integrate my diverse interests and wide knowledge base with teaching.