The Overboard star's charity, The Hawn Foundation, works to teach social skills to kids, and the organisation's MindUP scheme has been implemented in selected classrooms.
Hawn visited a school in Hackney on Tuesday to see how the techniques have been helping youngsters and she was delighted with the results.
In a series of posts on her Twitter.com page, she writes, ""Happy classroom environments, happy kids. Witnessing pure joy in MindUp classroom at Lauriston Primary School in London! Great day visiting our schools here.""