I don't think this search is focused enough to be useful (in either direction.) For example, the first page of NYT results includes stories about a lack of male teachers, but also about gender imbalances against women in labs, varying educational outcomes between boys and girls, and China's one-child policy.
EG https://www.google.co.uk/search?q=gender+imbalance+education...
Although using WSJ proves you right: https://www.google.co.uk/search?q=gender+imbalance+education...