need help with "up until" and similar phrases

[kaox0018]

how would you say something like "i was confused about math all the way through high school and it wasn't until college that it made sense to me."

i'm thinking something like "我一直到高中都不太了解數學. 我念大學才開始了解."

[bhchao]

我一直到高中被數學搞胡涂了. 進了大學時候, 我的數學才開始進步.

[Hanyu'sWay]

数学这一门我直到高中都还搞不清楚，要到上了大学才真正开窍。

[calibre2001]

I'm borrowing and modying bhchao's

我一直到高中被數學搞胡涂,至上大學爲止

This kind of sentece structure is quite popular, note the mandatory usage of 爲止 at the end of the sentence and words equivalent to 'until/up' (e.g. see the bolded 至 above) to open the subsentence that ends with 爲止

More examples

http://dict.youdao.com/search?q=%E7%88%B2%E6%AD%A2&btnindex=&ue=utf8&keyfrom=dict.index

[kaox0018]

thanks

[Jialihai Jiejie]

Can also be summarised as:

我直到高中都不了解數學. 念大學才了解

Jialihai Jiejie