WASHINGTON — For years, Betsy DeVos traveled the country — and opened her checkbook — as she worked as a conservative advocate to promote the expansion of voucher programs that allow parents to use taxpayer funds to send their children to private and religious schools.

A detailed look at the first six months of Ms. DeVos’s tenure as the secretary of education — based on a 326-page calendar tracking her daily meetings — demonstrates that she continues to focus on those programs as well as on charter schools.

Her calendar is sprinkled with meetings with religious leaders, leading national advocates of vouchers and charter schools, and players involved in challenging state laws that limit the distribution of government funds to support religious or alternative schools.

On June 13, for example, she started her day by speaking to about 4,000 people who had gathered in Washington for the National Charter Schools Conference, the records show.