This lesson can only be opened if you have the SMART TECHNOLOGIES Notebook Program. The lesson was created using the 2018 Ready Math New York CCLS Resource Book for Second Grade. Lesson 5 Day 4 is titled Adding Using Arrays. I've added hands-on practice building arrays with square tiles. I also included math fluency drills on skip counting by 2's to the beginning of the lesson. Ready Math suggests giving the Lesson Quiz after day 4. I taught an additional day to review the concepts. If you are looking for more practice before the quiz look for my "Ready Math Grade 2 Lesson 5 Day 5" lesson on SMART.