Too many grant projects disappear after the funding is gone. How can you assure ongoing benefits once the funding runs out is one of the biggest questions in the mind of the grant reviewer. In the passion of writing a grant it is easy to get too ambitious. A major red flag for grant reviewers is the indication you've planned to accomplish more than your budget makes realistically attainable. It is better to limit your proposal to less, more assuredly attainable goals, than to promise more than you can deliver.
Most projects find they badly underestimated funding for staff and particularly technology support.
Tie yourself to a major regional, or national, issue and position your proposal as a model to be replicated once you've proved your idea works. Make it clear you're not just benefiting ten people in Two-Dot, Montana, but that you're solving a problem shared by all rural schools and are creating a replicable national model. A specific strategy for broadly sharing your solution should be specifically part of your proposal plan. Choose your partners wisely. The more partners you have to deal with, the harder it is to keep everyone happy, particularly where control of large sums of money is the issue.