Frontier School Corporation Authorized Investment Providers For specific investment provider information, please click on the investment provider name of your choice to visit the company's website. 403(b) Horace Mann Retirement Advantage(844) 895-0980 457(b) Horace Mann Retirement Advantage(844) 895-0980 Roth 403(b) Horace Mann Retirement Advantage(844) 895-0980 Roth 457(b) Horace Mann Retirement Advantage(844) 895-0980