 This is the VOA Special English Education Report. About 10 percent of spending on primary and secondary education in the United States comes from the federal government. For 10 years now, federal law has tied this spending to student performance. States have been required to show progress through yearly testing. With states, state testing tells only part of the story about efforts by schools and students to improve. So the Obama administration has eased the limits on states in measuring performance. The western state of Colorado, for example, has a new assessment method. This new measurement tool is called the Colorado Growth Model. The idea is to show academic growth, just not achievement on tests. It combines test scores, family income levels, school size, the ethnicity of the student and many other factors. Bill Bonk is one of the creators of the Colorado Growth Model. He says, it's a very fancy calculation, we're very proud of it. The results from schools across the state are shown online on a graph. The graph shows a school's average score on standardized tests as well as its academic growth. Josh Smith is a principal of a middle school in a network of public charter schools called West Denver Prep. Charter schools are publicly funded but not operated the same as traditional public schools. Mr. Smith says he likes to show his students this graph so they can see their schools progress. Many of his students have parents who do not speak English. He likes to play word games with his students to help them expand their vocabulary. Eighth grader Juan Saltero says names like these and studying hard have raised his expectations for himself. He says he wants to be an electrical engineer. The teachers really want you to learn, he says. They give you support and talk you through things. On average students enter sixth grade at West Denver Prep performing below grade level. But three years later most are outperforming other students across the state. The new assessment method shows that each year the average West Denver Prep student learns more math than 94% of all the students in Colorado. Reading and writing scores also show growth. Josh Smith says the students have to study hard to meet high expectations. He says perhaps the most important thing they should learn is to believe in themselves. You can watch a video about West Denver Prep and the Colorado Growth Model at voaspecialenglish.com. For VOA Special English, I'm Carolyn Presuti.