Currently about what percent of earth's land surface is covered by glaciers (1 point)
a. 70%
b. 25%
c. 10%
d. 40%

Ms. milanova, a bilingual educator, teaches her students a new language by using the language with which they are already familiar. only after the students have mastered the basics of the new language does she primarily begin to speak the new language during instructional periods. this approach to bilingual education is often called