public async Task <IActionResult> Download(string sectionName)
        {
            // Gets list of sections and students from db for user to choose from
            var downloadCandidates = await SubmissionService.GetCheckpointDownloadCandidateListAsync(
                ClassroomName,
                ProjectName,
                CheckpointName);

            List <SectionsAndStudents> sectionStudents = downloadCandidates.Select
                                                         (
                dc => new SectionsAndStudents()
            {
                SectionId   = dc.Section.Id,
                SectionName = new SelectListItem()
                {
                    Text  = dc.Section.DisplayName,
                    Value = dc.Section.Name,

                    // Whichever section the user had clicked on before
                    // choosing to download should be checked by default
                    Selected = (dc.Section.Name == sectionName)
                },
                SelectedStudents = dc.Users.Select
                                   (
                    user => new StudentToDownload()
                {
                    Selected  = true,
                    FirstName = user.User.FirstName,
                    LastName  = user.User.LastName,
                    Id        = user.User.Id,
                    Submitted = user.Submitted
                }
                                   )
                                   .OrderBy(ss => ss.LastName)
                                   .ThenBy(ss => ss.FirstName)
                                   .ToList()
            }
                                                         )
                                                         .OrderBy(sas => sas.SectionName.Text)
                                                         .ToList();

            DownloadSubmissionViewModel viewModel = new DownloadSubmissionViewModel()
            {
                IndexForSectionStudentsView = -1,
                Format              = ProjectSubmissionDownloadFormat.All,
                IncludeUnsubmitted  = true,
                SectionsAndStudents = sectionStudents,
            };

            return(View("Download", viewModel));
        }