<asp:Repeater runat="server" ID="AcademiesRepeater" >
		<ItemTemplate>
			<div>
				<asp:RadioButton runat="server" ID="rbAcademyValue" GroupName="AcademyRadioGroup" AutoPostBack="True"
					OnCheckedChanged="AcademyRadioButton_CheckedChanged" Checked='<%# Eval("IsSelected")%>' />
			</div>
		</ItemTemplate>
	</asp:Repeater>

protected override void OnLoad(EventArgs e)
{
        ...
        AcademiesRepeater.DataSource = academies;
	AcademiesRepeater.DataBind();
}
protected void AcademyRadioButton_CheckedChanged(object sender, EventArgs e)
{
        ...
}