Toronto District School Board has blocked Snapchat, Instagram and Netflix after it found that those three sites were burning up more than 20 per cent of the board WiFI capacity. In a statement Tuesday TDSB said these sites are making many necessary operational tasks like attendance, registration and report cards nearly impossible to complete. The “interim measure” will help alleviate congestion and boost network capacity while minimizing the impact on teaching and learning, it said. The board said it was working on providing a faster network, and said regular WiFi access is expected to resume in September.