How was the Court's decision in the Lemon case used to decide the Zelman case?

The Court's decision in the Lemon v. Kurtzman case established the Lemon Test, which assesses whether a law violates the Establishment Clause by examining its purpose, effect, and entanglement with religion. In Zelman v. Simmons-Harris, the Court applied the Lemon Test to determine that Ohio's school voucher program did not violate the Establishment Clause because it had a secular purpose, provided benefits directly to parents, and allowed them to choose religious schools without government coercion. This reasoning highlighted the distinction between government aid and direct government involvement in religious education, ultimately leading to a ruling that upheld the voucher program.