Final answer:
The federal government entered the field of elementary education in response to events such as the passage of the 1965 ESEA and the No Child Left Behind Act of 2002. Court cases like Agostini v. Felton and Mills v. Board of Education of the District of Columbia also influenced federal involvement.
Step-by-step explanation:
The federal government entered the field of elementary education in response to several events. One such event was the passage of the 1965 Elementary and Secondary Education Act (ESEA), which provided funding for developing remedial programs, hiring teachers and aides, and purchasing supplies and equipment. Another event was the No Child Left Behind Act of 2002, which aimed to close the achievement gap and improve school performance. Additionally, court cases such as Agostini v. Felton and Mills v. Board of Education of the District of Columbia influenced federal involvement in elementary education.