Harold K.L. Castle Foundation Grants
Eligibility
Hawaii nonprofits and educational organizations. The Harold K.L. Castle Foundation focuses on education, community, and environment in Hawaii. K-12 programs that demonstrate measurable impact on student learning are prioritized.
Program Goals
The Harold K.L. Castle Foundation funds education and community programs in Hawaii with a focus on improving life for Hawaii residents. K-12 STEM programs, environmental education, and technology access initiatives are strong fits for foundation priorities.
Read the GrantApplication and Distribution
Rolling applications. The foundation accepts inquiries and proposals throughout the year. Check castlefoundation.org for current guidelines and application process. Early engagement is recommended for larger grant requests.
Cycle Notes
Rolling — no fixed deadline. The foundation reviews proposals throughout the year. Larger grants may require a letter of inquiry before a full application.
Grant Award Amount
Award amounts vary by program and project scope. The Castle Foundation funds a range of grant sizes for Hawaii education programs.
Allowable Purchases
Forward Education Products for This Grant
These kits align to the learning outcomes this program funds.
- Coding for Good Kit — an all-in-one coding, robotics, and AI literacy toolkit using micro:bit for real-world challenges
- Climate Action Kit — a beginner-friendly STEM kit combining micro:bit sensors to code solutions for climate change and sustainability
- Smart Solar Energy Kit — build and program a working solar panel to measure real-time power generation and explore renewable energy
- Forward Education Learning Platform — curriculum-aligned STEM lessons, coding tutorials, career profiles, and PD courses
Frequently Asked Questions
Is there an application deadline?
Rolling — the foundation accepts proposals throughout the year. Check castlefoundation.org for current guidelines.
What types of programs does Castle Foundation fund?
Education, community, and environment programs in Hawaii. K-12 STEM and technology programs are a strong fit.
Should we submit a letter of inquiry first?
For larger grant requests, a letter of inquiry may be the first step. Check castlefoundation.org for current application process.
Is this a Hawaii-only funder?
Yes — the Harold K.L. Castle Foundation focuses specifically on Hawaii.
How can Forward Education help?
We provide curriculum alignment documents and impact-focused program narratives for foundation grant applications.
Need Help Writing Your Grant Application?
Forward Education works with schools and districts to build strong funding proposals.
- Curriculum alignment documents — Hawaii standards mapped to our kits
- Program quotes and pricing
- Letters of support
- Project ideas and scope-and-sequence
