"Has this ever happened to you?
'My lecture went perfectly! I worked the sample problems. I could tell the students really understood the material.'
The next day: 'I don’t know what went wrong! I thought all my students understood what I went over yesterday...' "
Read more from Frederick Dillon, author of Your Mathematics Standards Companion, High School, and The Common Core Mathematics Companion: The Standards Decoded, High School, on Corwin Connect.