By MARK AGEE Classes will resume Wednesday at Grapevine High School after two missed days, Grapevine-Colleyville school district officials said in a statement released late Tuesday morning.Classes were canceled Monday and Tuesday after a water main broke and flooded about a fifth of the school on Sunday afternoon. The estimated damages are between $500,000 and $1 million, most of which should be reimbursed by the district’s insurance company, officials have said.Repairs will continue and the affected area of the building — which includes the library, band hall, two gyms and the choir hall — will be blocked off from student access.Classes and activities that usually use those areas will be relocated.Power and water services have been restored to the building, and safety systems are operational, district spokeswoman Megan Overman said in an e-mail.Students should follow "B" schedule on Wednesday, she said.District authorities said they have asked the Texas Education Agency for a waiver so they would not have to make up the missed days.