public class SeasonScore
{
    [Key]
    public int SeasonScoreID { get; set; }

    [DisplayName("Season")]
    public string season { get; set; }

    [DisplayName("Year")]
    public int year { get; set; }

    [DisplayName("Value")]
    public decimal value { get; set; }

    [DisplayName("Subject")]
    public virtual Subject Subject { get; set; }
}

public class Subject
{
    [Key]
    public int SubjectID { get; set; }

    [DisplayName("Subject")]
    public string subject { get; set; }

    [DisplayName("Scores")]
    public virtual List<SeasonScore> scores { get; set; }

    public Subject()
    {
        scores = new List<SeasonScore>();
    }
}