This site gamifies and enlivens quizzes. The upbeat environment allows for optional music, immediate feedback, timers, and fun memes. You can create your own quizzes or borrow and modify from an extensive bank of existing quizzes.
Amazon Inspire is a service that provides educators a place to discover, manage, rate, review, and share educational resources. Search by title, subjects, grade levels, resource types, publishers, and standards.
OER Commons offers a comprehensive infrastructure for curriculum experts and instructors at all levels to identify high-quality OER and collaborate around their adaptation, evaluation, and use to address the needs of teachers and learners.