Typically an item will start with a Committee, either in a stand alone meeting or as part of a Committee of the Whole Meeting. Should a Committee approve an item, it makes a recommendation which will then go before the full board for the next regular School Board Meeting for approval.
Once at the full board meeting, the board will consider the recommendation and can approve, vote down, table or redirect the recommendation back to a Committee. In some cases, the motion can be modified on the floor immediately before a vote, however complex changes usually go back to a Committee.
In the case of policies, the board must acknowledge receipt of recommended changes at one meeting (first reading), and then approve the changes at a subsequent regular board meeting (second reading). When an item is sent back to a Committee, the item needs to go through both the first reading acknowledgement and the second reading approval again.