By BROOKE KANSIER
Capital News Service
LANSING — Many K-8 math textbooks are missing crucial elements: the subject’s required lessons under the Common Core education standards. A Michigan State University study of mathematics textbooks found that among 185 textbooks and 34 textbook series, only seven included all materials required under national Common Core standards. Researchers studied textbooks used by other Common Core states as well as books marketed as Common Core-aligned. These results were backed up by a recent study from nonprofit EdReports.org, which found similar results — 17 of the 20 textbooks studied were missing important Common Core lessons. Michigan schools are still working on completely implementing the recently adopted state standards.