The Williamsville Central School District is expected to see enrollment declines over the next 10 years as elementary enrollment continues to fall.

The five-year history and five-year projections for elementary schools show continuing declines, according to a study by consultant RED Group shared with the School Board on Tuesday night.

Middle school enrollments have remained relatively flat over the last five years but are expected to fall in the next five years. High schools have seen a decline, but five-year projections for the high schools indicate mild but steady, short-term growth.

In other news:

• A class size report by the district showed that seven classrooms in grades two, three and four at Dodge and Maple West elementary schools were over class size guidelines. Another seven classrooms at Transit, Mill and Heim middle schools had classes with more than 30 students.

Finally, at the high school level, six classes at North High and two classes at South High had more than 30 students to a class. But 62 classrooms had fewer than 15 students.

Superintendent Scott Martzloff attributed the low class sizes to the desire by the district to continue to offer a wide variety of course and program choices for high school students.

Martzloff said the class size overages were due to a 49 percent increase in the number of new students enrolling in the Williamsville district. The district had 225 more new students at the start of last school year, but that figure grew to 334 students at the start of this school year.

• A review of the independent audit of the district for 2011-12 shows that the district raised $152.82 million in revenue and had $154.86 million in expenses, said Assistant Superintendent Thomas Maturski. The district fell short of raised revenue by $2.04 million. That deficit was covered by district reserves, he said.

Since $2.02 million was needed for one-time contractual expenses, he said, the use of reserves to cover the deficit was appropriate. “We really are in a balanced budget situation,” Maturski said.

The district still has $50.61 million in reserves, though much of it is already earmarked for specific expenses, he said.