Testing in California: An overview
GreatSchools Ratings and the California API
GreatSchools also calculates a rating on a scale of 1 to 10 based on California test results. There are several important differences between GreatSchools Ratings and California API Ranks:
- API Ranks are created by the California Department of Education. GreatSchools Ratings are created by GreatSchools.
- The API is calculated using results from the CSTs, CMA, CAHSEE, and the CAPA. GreatSchools Ratings are calculated using the CSTs only.
- Some test subjects count more than others in the API. In GreatSchools Ratings, all CST subjects have equal weight.
- The API includes all 5 levels of proficiency (far below basic, below basic, basic, proficient or advanced), each receiving a different number of points toward the total API. The API is calculated this way to encourage improvement in test scores. GreatSchools Ratings use only the percent of students who scored at the proficient and advanced levels. GreatSchools Ratings show how the percentage of students on grade level at a school compared to schools across the state.
California's Reading List
As you decipher the bar graphs and national percentile ranks on your child's STAR report, don't ignore the small print in the lower left-hand corner. Here, the state has provided your child's California Reading List Number — a number you can use to encourage your child to read throughout the school year.
Your child's California Reading List Number is determined by his performance on the reading comprehension portion of the California Standards Test (CST). This number will lead you to books that match your child's reading level and are appropriate for his age.
How to Use the Reading List Number:
- First, go to the state's reading list on the Internet here: California Reading List.
- Search for a book by entering your child's grade level as well as the Reading List Number (01 to 13+) from your child's STAR Report.
- The site will bring up titles, authors and short summaries of all materials that match your child's reading level.
- You can refine your search by filling in a keyword, such as "animals" or "mystery."
Instead of selecting books strictly by grade level, the California Reading List allows you to find grade-level books with suitable content. For example, if your seventh-grader is reading at the 11th-grade level, you can find books written at a high school level that have topics and themes that are interesting for a younger reader.
Where to find books
Once you've found some good book suggestions for your child, print out the titles and authors and take your child to your local library or a bookstore, or order books from a vendor on the Internet.
Search for California schools.

