SchoolStartDates tracks first days, breaks and last days for the 2026–27 school year across 125 of the largest US school districts. Districts that haven't adopted a 2026–27 calendar yet say so rather than carrying last year's dates forward, and every date names and links the calendar it came from.
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Education sites that earned a spot
Schools, courses and learning tools that explain themselves on the first pass.
5 sites · every one earned it
Nitro Type is a free browser game where students build typing speed by racing each other through short passages. Built in 2011 by the team behind Typing.com, it ships with no player chat at all — a deliberate omission that keeps it in classrooms.
Instructure makes Canvas, the learning management system that carries coursework, assignments and grading for schools and universities in over 100 countries. Canvas is open source under the AGPLv3, with its full codebase public on GitHub — unusual for infrastructure this entrenched.
MagicSchool is an AI platform built for K-12 classrooms — teachers, students and district administrators. Founded by Adeel Khan, a former Denver public high school principal, it keeps the core teacher toolset free rather than behind the district contract.
DeltaMath is a math practice platform for middle and high school classrooms, with automatically graded problem sets and instant step-by-step feedback. A New York City algebra teacher wrote it in 2009 for his eleventh graders, and problems still regenerate their numbers so no two students can copy.