Final answer:
The most effective resource for assisting high school students in developing career portfolios, making educational plans, and taking career assessments is The Kuder Career Planning System.
Step-by-step explanation:
The most effective resource for assisting high school students in developing career portfolios, making educational plans, and taking career assessments is The Kuder Career Planning System. The Kuder Career Planning System is designed to help students identify their interests, values, skills, and strengths, and match them to potential career paths. It provides career assessments, resources for career research and exploration, and tools for setting career goals and creating action steps.
Another option mentioned in the question, The Strong Interest Inventory, is also a valuable tool that helps individuals understand their interests and how they align with different career areas. However, it may not be as comprehensive in providing resources for career planning and educational plans as The Kuder Career Planning System.