In the checkbox section of the Form Input Bindings page, you use the v-model notation to bind a value to the form.
For some use cases (e.g. Vuex) a manual double binding example would be helpful. Also note that for checkboxes, the @change callback should be used, as IE11 does not understand the @input event, which is referred to on the same page. An additional example would really help and save people lots of time.