Editing to say that I didn't intend to reply to you P.U.T.U. I saw that I did that when it posted.
I haven't heard about any districts doing this and have friends who work or send kids to multiple districts in the northeast metroplex (Collin/Dallas County border).
Slightly related note:
I find it interesting to look at the dashboards from various districts. The information they provide varies from district to district:
Wylie ISD Dashboard 42 current cases, 662 currently quarantined (exposed); You can even calculate the number of total positives from the beginning of the year: 185.
Plano ISD Dashboard 149 cases, quarantined/exposed not listed; They list number of recovered, though.
Richardson ISD DashboardThe
DSHS Dashboard compiles all staff and student cases from across the state into one place. They, however, only list students who actually go to campus, either for instruction or extracurriculars. Near the bottom of the page, you can choose a week to open an Excel Sheet that lists every district in the state and their weekly data.