How many types of Direct Stafford loans for students?

There are two main types of Direct Stafford Loans for students: subsidized and unsubsidized loans. Subsidized loans are need-based and do not accrue interest while the borrower is in school at least half-time, whereas unsubsidized loans are not based on financial need and interest begins accruing immediately. Both types have specific eligibility requirements and repayment terms.