There are many resources here that can be used for extra practice and mastery.
Algebra 1 Next Generation Workbook Support
http://www.courseworkbooks.com/videos-algebra1.php
Open Up Curriculum Resources
https://access.openupresources.org/curricula/our-hs-math/en/aga/algebra-1/index.html
Kahn Academy
https://www.khanacademy.org/math/algebra
Math Bits Notebook
https://mathbitsnotebook.com/Algebra1/Algebra1.html
Calculator Help
https://mathbits.com/MathBits/TISection/Openpage.htm
PBS Learning - Lots of Information
https://ny.pbslearningmedia.org/subjects/mathematics/high-school-algebra/?rank_by=recency