The scheme asks people to donate old mobile phones for recycling. For every 250 phones recycled, interactive learning technology company Promethean will donate 500 to the children's charity. Schools which take part also receive a set of interactive "learner response" systems.
The handsets allow pupils to text their responses to teachers, making it easier for them to respond anonymously in discussions about sensitive topics such as family relationships and bullying.
Money raised by the appeal goes towards the NSPCC's ChildLine in Scotland, a 24-hour helpline which currently receives more calls than can be answered due to lack of funding.