$732 million.

That's how much is at stake in metro Detroit school districts as they seek voter approval on Tuesday for big bond proposals that would pay for a range of projects. Much of that money would be targeted at improving security, making buildings safe, upgrading technology and outfitting classrooms with the kind of equipment students will need to be competitive in the future.

In all, 13 school districts in Macomb, Oakland and Wayne counties have school-related proposals on the ballot. Seven are floating bond proposals — including five that range in cost from $97 million in Chippewa Valley Schools to $160 million in Lake Orion Community Schools.

In all of them, safety and security are big targets.

"The proposal reflects the world we live in," said Ron Roberts, superintendent of the Chippewa Valley district. "When it comes to schools, it's important that we all do what we reasonably can to protect people."

Included in the $97-million bond is the purchase of new security cameras to replace those that are outdated. The district would also spend money to modify the entrances at some schools to make them more secure. Panic buttons would be installed in offices. Door locks would be changed.

The proposal would touch other areas, such as replacing technology and old school buses, as well as replacing some roofing, plumbing and mechanical systems. It would also pay for state-of-the art equipment for career and technical education programs.

The district was able to structure the bond proposal so that it won't result in an increase in the overall school tax rate. Instead, the district would extend its current debt millage. Current bonds are set to expire in 2035, but if voters approve the $97-million proposal, the expiration date extends to 2043.

For more information, go to www.chippewavalleyschools.org.

Here are the other school bond proposals voters should look for Tuesday:

Lake Orion Community Schools

The district's $160-million bond proposal is the largest one in metro Detroit and it has three themes: Safer schools, smarter schools and stronger schools.

Among the projects: Build more secure school entrances, improve accessibility for students and visitors with physical challenges, replace old school buses, renovate classrooms, purchase technology equipment, create an early childhood center and upgrade mechanical, electrical and plumbing systems.

The impact: The district's website says that the proposal would not result in an increase in the district's overall tax rate because it has been structured so that the debt millage rate will remain at or below the current level of 7.5 mills.

For more information: Go to www.lakeorionschools.org

Wayne-Westland Community Schools

The district is asking voters to OK a $158-million bond proposal.

Among the projects: Safety and security upgrades at every building, classroom upgrades, improvements to the aging infrastructure of buildings, replacing school buses.

The impact: The district says it'll cost the owner of a home with a market value of $100,000 and a taxable value of $50,000 an additional$88 per year.

For more information: Go to www.wwcsd.net.

Utica Community Schools

In the Utica districts, voters will weigh a $155-million bond project.

Among the safety and security measures: More secure school entrances, adding security cameras, installing emergency alert systems and replacing buses.

The money would also pay for building renovations, mechanical and electrical work, as well as technology improvements.

The impact: The district says the proposal won't result in an increase in the tax rate because it's structured so that the debt millage tax rate will remain at or below 3.5 mills throughout the life of the bond.

For more information: Go to http://www.uticak12.org/2018bond

Grosse Pointe Public Schools

A $111-million bond proposal is on tap, with four themes: Keeping students safe, dry, warm and connected.

The safety initiative includes creating secure entrances, installing security cameras and updating PA systems. It also includes improvements to building sites, such as paving, emergency lighting and fencing.

Meanwhile, the bond would also fund projects to install efficient heating, ventilation and air-conditioning systems, as well as new technology infrastructure.

The impact: The district says it'll cost the owner of a home with a market value of $400,000 and a taxable value of $200,000 about $300 annually.

For more information: Go to https://mi01000971.schoolwires.net/

Holly Area Schools

The district is asking voters to approve a $38-million bond proposal.

The projects include: Creating secure entrances, adding new door hardware for classrooms, adding video surveillance, replacing failing heating and cooling systems, replacing inefficient lighting and electrical systems, replacing aged roofs, upgrading technology, purchasing new technology devices for students and staff.

The impact: Superintendent Scott Roper said the proposal won't result in an increase in school taxes because "our diligence in paying off previous debt and achieving interest savings has allowed us to propose this bond with no tax-rate increase."

For more information: Go to www.hask12.org

Riverview Community Schools

The district has two proposals on the ballot: One is a $13-million bond proposal; the other is a proposal to create a sinking fund millage — a special fund that allows school districts to collect revenue for major building repairs and other upgrades.

The bond proposal, if passed, would fund projects that include creating secure entrances, installing surveillance systems, replacing mechanical systems, upgrading electrical systems, installing new elementary playground equipment, replacing PA systems and emergency equipment.

The sinking fund would cover projects that include security upgrades, renovating secondary science classes, replacing outdated maintenance equipment and purchasing emergency generators for buildings.

The impact: The district says the bond proposal will not result in an increase in the tax rate. The sinking fund would cost the owner of a home with a market value of $100,000 and a market value of $50,000 an additional $100 annually.

For more information: Go to https://www.riverviewschools.com/ and click on "show all news."

Elsewhere in Metro Detroit

In addition to the seven bond proposals, two school districts — Ecorse Public Schools and Van Dyke Public Schools — are asking voters to approve sinking fund millages.

Meanwhile, four districts have routine millage renewals or replacements on the ballot: Mount Clemens Community Schools, Roseville Community Schools, Brandon School District and Troy School District.

Read more:

Gerrymandering: Pros and cons of Proposal 2

Michigan's Proposal 3 would make it easier to vote

Contact Lori Higgins: 313-222-6651, lhiggins@freepress.com or @LoriAHiggins