head teacher的汉语意思

班主任和校长的英文
权威点的
我查牛津中阶英汉词典，说head teacher是校长，为什么大家都倾向于head teacher是班主任呢？就因为headmaster是专指校长吗？

英语题（完形填空）
（in the end,make a decision,head teacher,to one's surprise,even though,no longer,take pride in ,pay attention to,give up,be not interested in）选择括号中的短语并用其适当形式进行填空.
when i was young,i used to get into trouble with my classmates.my _1_ often said it was important to get along well with others.however,i always thought i could do everything well by myself.
at that time,i __2__ my sudy at all.i relly wanted __3__ to go to school.so i often slept in class.at lsat,nearly every teacher didn't __4__ me,they __5__ me.
one day ,my head teacher asked me to go to her office.__6__ she told me my classmates had elected(***) me to be the new monitor.
i felt very happy because i had never been a monitor.i relly wanted to be a good monitor.first ,i __7__ to study hard.__8__ i tried to remember the new things,i couldn't catch up with others,my classmates helped me .i was moved .__9__ ,i caught up with others .and i __10__ having so good teachers and classmates.
1.______ 2._______ 3._______ 4._______ 5._______ 6.______ 7._______ 8._______ 9._______ 10._______