Algebra 1

Update to Algebra 1 format. Illustrative math has split the old unit 2 into two units. The first half of unit 2 has remained unit 2. The second half of unit 2 is now unit 4. The old units 4 through 7 are now units 5 through 8. The labels on this page will now reflect the new structure but the material that was already created such as videos and worksheets will still reflect the old structure. While the numbering has changed, the lesson names are still the same.