If you are a resident of The Netherlands you can sign the Dutch petition at:
NVvTO has set up a separate international petition for supporters living outside The Netherlands as well.
Stop the Ban on Home Education
This petition calls for the preservation and strengthening of the legal basis for home education (In Dutch: Thuisonderwijs – TO). The State Secretary for Education is planning to make it impossible to home educate (via exemption from compulsory school attendance under article 5.b. of the Compulsory Education Act). This is evident from his letter in July 2013 to the Second Chamber of the Dutch Parliament.