Parents are keeping their children off school for the day in protest at controversial tests for 6 and 7-year-olds. Strikes like this in Gloucester are taking place across the country.
The action comes after more than 40,000 people signed a petition supporting a boycott of Year 2 Sats by teachers.
The 'Let Our Kids Be Kids' campaign has organised the day of action in protest at children being "over-tested, over-worked and in a school system that places more importance on test results and league tables than children's happiness and joy of learning".
Speaking on Saturday, Education Secretary Nicky Morgan warned that missing school even for a single day would be "harmful" and called for those behind the "damaging" campaign to reconsider.