Be as detailed as possible - even including a rough lesson plan. The grant writing process may also seem a bit more tedious than websites like DonorsChoose that offer users editing support since the philanthropies often do not offer users writing help.
Well, foundations across the country hand out millions of dollars to teachers each year. Project evaluation - How will you evaluate the effectiveness of your grant? There are some tools that make dealing with bunches of iPads; if Tech Person at your school knows how to make them work and will do your bidding, by all means, go with that.
These sites have a wealth of grant information and updates: Grants. Windows or OS X laptops are probably a bad idea unless you have some Tech Person who will make them do what you want them to.
Can you use the technology to assess?