As 6th graders move from arithmetic to algebra, check out this 6.EE.A mini-assessment.
http://achievethecore.org/page/910/extending-previous-understandings-of-properties-mini-assessment-detail-pg?utm_content=bufferdd274&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
OK, that's a long address, how about:https://t.co/9aOWnJPPWW