The best alternatives to 250+ Student Resources are College OS, Student Resources, and CollegeApp OS. If these 3 options don't work for you, we've listed a few more alternatives below.
StudentResources.de is a list of 500+ resources, templates & tools built by Asteroid (https://www.myasteroid.com) that help students on their journey to build a successful career worldwide.
CollegeApp OS is a comprehensive Notion dashboard to help high schoolers apply to college. It curates some of the best admissions resources and also serves as an all-in-one workspace for students to draft essays, track to-dos, and organize applications.
As a high schooler, I developed the platform for other students. With access to notes & quiz functionality, students can learn and test knowledge in subjects. With database of opportunities and organizations, students can find extracurricular opportunities.