Though this is more about pie-in-the-sky this would be cool and inspiring stuff, practically, our best options right now are solar thermal power.

Concentrated solar power uses no new materials-- glass, steel, mirrors, steam turbines, water, and occasionally fancy salts that we've already invented. It's one of the only renewable alternatives that doesn't want any money for research, just help getting some of the start up money to use materials we already have and make here in the US to build up these plants. Though they're not price-competitive yet, most research suggests that once enough capacity is built, economy of scale will kick in and it'll be competitive with fossil fuel costs within five years.

Talk about the ability to prime pump a market.

Plus, concentrated solar works naturally with usage peaks and can be used for desalinization/purification of water which is great considering regions where there is little rain/cloud coverage is ideal.

Two things need to happen-- we need to build more terrestrial solar capacity, both concentrated thermal and photovoltaic, and more importantly, we need to construct better power infrastructure so we can deliver energy from high solar density areas (which are typically desolate and therefore don't have the power pumping capacity some areas have) across far distances.

Why are students each getting a laptop? What's the goal? Is it to have a single environment with a single set of software that students can all work on commonly to assure instruction can make use of computers effectively? Is it simply to ensure students have computer literacy and/or access to computers for those who do not? How are you going to use these laptops day to day that is unique to what can be done from a home computer or library computer or computer cluster? These are the questions you have to ask before determining how much you want to limit student use. My initial inclination is that limiting the ability to mess with these computers is a huge mistake. It makes students less likely to learn about the machines they're using and less likely to use these machines. It makes these computers a hassle and something used solely for class assignments that cannot be done any other way and a paper weight the rest of the time. The only limitations should be use of anti-virus software and other protections so that they cannot hurt the network at the school when attached to it. Blocking ports for instant messaging services and internet filtering while in school is appropriate to ensure the integrity of the network, but crippling the computers is not necessary or advantageous. Are students really going to be expected to use a single machine bought in 6th grade through 12th grade? Are you going to be able to remove these restrictions, and be willing to go through the work to do so, when students buy their computers out right when they graduate? That could be a ton of work. Protect the network, block stuff from coming in that can affect other machines, but don't cripple the computers themselves. You'll only assure their limited use/usefulness. But honestly, before spending all that money, there need to be some good answers as to why your curriculum has unique needs that require each student have a laptop.