BOSTON — All public elementary schools in Massachusetts will be required to open for full-time, in-person learning by April 5, while middle schools will be required to do so on April 28 under a state plan.

The state Department of Elementary and Secondary Education's plan announced Tuesday did not set a reopening date for high schools, but the department said districts would be given two weeks' notice.

The announcement comes days after state Education Commissioner Jeffrey Riley was given the authority to determine when hybrid and remote learning models will no longer count toward student learning hours.

Also Tuesday, newly confirmed coronavirus deaths in Massachusetts rose by 20.

LOOK: Milestones in women's history from the year you were born

Women have left marks on everything from entertainment and music to space exploration, athletics, and technology. Each passing year and new milestone makes it clear both how recent this history-making is in relation to the rest of the country, as well as how far we still need to go. The resulting timeline shows that women are constantly making history worthy of best-selling biographies and classroom textbooks; someone just needs to write about them.

Scroll through to find out when women in the U.S. and around the world won rights, the names of women who shattered the glass ceiling, and which country's women banded together to end a civil war.