Voters in Santa Clara and San Mateo counties appeared to be strongly supporting a raft of school bonds in early returns Tuesday, while a parcel tax in the San Bruno School District appeared to be trailing. Eleven school districts in Santa Clara and San Mateo counties were seeking voter approval for bond or parcel taxes. The bond measures needed to win 55 percent of the vote to pass; parcel taxes required two-thirds approval.

Funds raised from the bonds would go toward school repairs, new classrooms, technology upgrades and other improvements.

Measure H, in San Jose Unified, was leading by 69 percent in early returns Tuesday.

Measure I, in the East Side Union High School District, was leading by 69 percent in early returns. Measure J, in the Alum Rock School District, was leading by 77 percent. Measure L in Mount Pleasant School District was leading by 71 percent.

Meanwhile, Measure K, a parcel tax to support operations in the Berryessa Union School District was easily hurtling the two-thirds vote requirements, as early returns showed it leading with 76 percent of the vote.

In San Mateo County, early returns showed strong voter support for Measure D in the Burlingame School District.

Also receiving strong support were Measure E in the Jefferson Union High School District, Measure H in the San Carlos School District and Measure I in the Jefferson Elementary School District.

Measure G, a parcel tax in the San Bruno School District, had slightly more than 55 percent in early returns but appeared to be falling short of the two-thirds vote required.

Here are the measures:

Santa Clara County

Measure G -- Morgan Hill Unified School District: would authorize issuance of $198,250,000 in bonds for technology, repairs and classrooms. Cost: $59 per $100,000 assessed valuation.

Measure H -- San Jose Unified School District: would authorize $290 million in bonds to pay off previous debt, add and upgrade technology and science labs, improve safety. Cost to property owners: $28.80 per $100,000 assessed valuation.

Measure I -- East Side Union High School District: would authorize $120 million in bonds to upgrade science labs, improve safety, repair and build classrooms. Average tax rate: $9.19 per $100,000 assessed valuation.

Measure J -- Alum Rock Union School District: would authorize $125 million in bonds for repairs, upgrades and construction. Average tax rate: $30 per $100,000 assessed valuation.

Measure K -- Berryessa Union School District: would extend an expiring $79 annual parcel tax for eight years to fund teachers, programs, technology and libraries.

Measure L -- Mount Pleasant School District: would authorize $25 million in bonds to upgrade classrooms, safety measures, restrooms. Tax rate: $30 per $100,000 assessed valuation.

San Mateo County

Measure D -- Burlingame School District: would authorize $56 million in bonds facilities to modernize facilities, science labs, upgrade technology, add and improve classrooms or reopen Hoover. Cost: $30 per $100,000 of assessed valuation.

Measure E -- Jefferson Union High School District: would authorize $41.9 million in bonds for construction and improvement. Cost: $11.83 per $100,000 of assessed valuation.

Measure G -- San Bruno Park School District: would assess a five-year, $199 annual parcel tax to support special education, upgrade curriculum, pay and train teachers.

Measure H -- San Carlos School District: would authorize $72 million in bonds to improve science and computer labs, add classrooms and save energy. Cost: $30 per $100,000 assessed valuation.

Measure I -- Jefferson Elementary School District: would authorize $67.5 million in bonds to modernize classrooms, science labs and technology, and upgrade facilities. Cost: $30 per $100,000 assessed valuation.

Contact Sharon Noguchi at 408-271-3775.