To help your student improve their math learning I recommend spending some about an hour each week over the summer going over concepts essential for success in 8th grade math. Depending on your student's needs this could include 7th grade concepts or prior year concepts. I think the best option for this type of review is Khan Academy. I also recommend spending some time reviewing vocabulary. Two resources that I recommend are Kahoot and Quizlet. I've included all the links for you below and will be updating this post with more specific links to help prioritize concepts and vocabulary words.
Khan Academy
Number System
Proportional Relationships
Solving Equations/Inequalities
Try using the links below to search for vocabulary words or topics to practice
Kahoot
Quizlet
List of the most important 7th grade concepts
Khan Academy
Number System
Proportional Relationships
Solving Equations/Inequalities
Try using the links below to search for vocabulary words or topics to practice
Kahoot
Quizlet
List of the most important 7th grade concepts