Spark Foundation general manager Lynne Le Gros said the scheme was for families at risk of being digitally excluded.
''We're excited to see more homes in the Clutha region turn into digital learning environments to better prepare students for the digital world.''
The prepaid internet service would start at $10 for 30GB, with free modem and connection provided.
Balclutha Library will oversee new subscriptions to the Spark scheme.