The Chicago Board of Education is giving itself the green light to issue up to $840 million dollars in school construction bonds. It’s not clear what specific projects the borrowed money will be spent on. In August, the district released a $338 million spending plan for repairs, building additions and new schools. At the time, officials said they would announce additional projects at a later date. This week, Chicago Public Schools spokeswoman Emily Bittner said they would announce more construction projects after the bond sale. The revenue from the city’s newly enacted Capital Improvement Tax will be used to pay back bondholders.