Struggles recruiting specialist teachers is a key problem, especially for schools in rural areas, Gayle Gorman told Holyrood’s Education Committee.
Ms Gorman, who is the chief inspector of education and chief executive of Education Scotland, said some schools were finding “innovative solutions” to teacher shortages but conceded it was impacting on the choices on offer.
Giving evidence during an often-contentious committee meeting, Ms Gorman told MSPs “we recognise there has been a reduction in some schools in curriculum offer”, adding: “one of the major factors has been teacher numbers”.
Pressed on teacher shortages, Ms Gorman said: “That is an issue that every school - and particularly those in rural areas - have found and do find challenging.
“A school should design a curriculum to meet their learners’ needs. They need to be able to shape that with the best resources they have.”
Nearly three-quarters of schools warned that difficulty recruiting teachers is constraining subject choice in a Holyrood survey.
Giving examples of how schools and colleges have tried to overcome the lack of subjects they are able to offer, Ms Gorman said some have collaborated to allow pupils to travel to different institutions for certain subjects.
“We see real innovation out of that hardship,” she said.
“We’re seeing schools setting up partnerships with employers to actually bring real-life employment opportunities and real-life modern techniques into the classroom to support that learning and offer different qualifications.”
Although Ms Gorman admitted it was a “minority” of schools developing ways to increase the choice available, she added: “We want to share that message so that it becomes a majority.”
Ms Gorman also claimed the choices schools offer is linked to areas of poverty, contradicting the results of a freedom of information request.
Explaining the findings, Green MSP Ross Greer said: “In areas where a school will have more than three-quarters of its pupils living in deprivation, the average offer at higher level is 17 subjects.
“In an area where less than one in four of the children at the school are living in an area of deprivation, the average offer is 23 subjects.”
Ms Gorman argued it was other factors that were having an impact, saying “our evidence is showing that the deprivation factor hasn’t been as significant” as they expected.
“Our experience and our evidence is showing us that there are other factors and to use that one indicator would be unfair to the systems and schools involved.”