A teacher has 21 red pens. If the ratio of red pens to blue pens she owned was 3:1, how many pens did she have total? It’s one of the word problems sixth-graders at Vera C. O’Leary Middle School were ...

Many school districts and policymakers are stepping up efforts to teach students the skills they need to be prepared for the jobs of the future. One big area of focus is STEM. Jobs in science, ...