I taught mathematics at the middle school level for 35 years. I'm currently retired but still involved as a math consultant for the Los Angeles County Office of Education and as instructor for the UCLA Mathematics project.For the past 7 years I've worked in professional development in math, focusing on the implementation of the Common Core State Standards in Mathematics. I am the lead teacher for the Los Angeles County Office of Education CCSS Institutes for grades 6-8. I've worked as a consultant for various school districts in California. I am a State Network Educator for the Digital Library of the Smarter Balanced Assessment Consortium. As such I reviewed resources that have been posted to the Digital Library to be used by educators nationwide.