My favorite EUB Cheat Sheet! It is available for download and is a great reference for parents whose students are working on assignments at home!
https://www.teachingvisuallyimpaired.com/uploads/1/4/1/2/14122361/ueb_braille_chart.pdf
If you need help with fractions, APH has a great lesson how to write fractions in braille.
Dots for Families is a great blog through the website Paths to Literacy. They have some pretty neat lessons available for you and your student to do together.
https://www.pathstoliteracy.org/blog/dots-families-braille-lessons
The Hadley School offers free lessons to parents and families of students who are visually impaired.
https://hadley.edu/braillecourses.asp
If your student is getting bored with their braille lessons, try making some braille art with the braille writer.
https://www.pathstoliteracy.org/blog/creating-braille-art-perkins-brailler