For the UCs, the 8 semesters that get honors points on the UC-calculated GPA are listed at https://hs-articulation.ucop.edu/agcourselist#/list/search/institution
Search for his school and look for the honors classes he took in 10th and is taking in 11th. If they have a star on the right, they get the weighted point. Many of a school’s “honors” courses will not get the extra point. All the AP classes will. His precalculus class may get the point, some honors science classes get it, and the foreign language class might if it is the 4th or 3rd year.
Ideally, he would have at least 4 year-long points in 10th and 11th. Also, any dual-enrollment classes would count as a point or two.