を通（つう）じて and を通（とお）して are two grammar patterns in Japanese that have very similar meanings to each other, and are used in many overlapping situations. Primarily, they can be thought of as meaning ‘through (A), (B)’, or ‘via (A), (B)’. This ‘through’ may either indicate a method, or a location.
通（つう）じる ‘to flow’, or ‘to go through’ and 通（とお）す ‘to make a path’, only differ in that the former is intransitive, while the latter is transitive. Because of this, 通（つう）じる will be seen more often in regard to information or communication where (A) is the connection through which (B) occurs. 通（とお）す on the other hand more often refers to direct locations through which something is transferred or relocated. As this expression begins with を, it will appear after nouns, before expressing in the (B) part of the sentence exactly what was done ‘through’ (A).

• その事件（じけん）はネットニュースを通（つう）じて知（し）りました。
  I learned about that incident through online news.
• 彼（かれ）はアニメを通（つう）じて日本語（にほんご）を学（まな）んだそうだ。
  I heard that he learned Japanese through anime.
• 語学（ごがく）留学（りゅうがく）を通（とお）して日本（にほん）の文化（ぶんか）などを学（まな）びました。
  I learned about Japanese culture and other aspects of Japan through language study.
• 仕事（しごと）を通（とお）して今（いま）の妻（つま）と出会（であ）いました。
  I met my current wife through work.