Can you make it as a farmer?
Formative is a web-based student response and assessment tool for the flipped, BYOD, or 1-to-1 classroom.
Google Classroom helps teachers manage workflow and communication with their students (it's available as a website, an Android app, and an iOS app).
Khan Academy, a free website aimed at promoting self-paced instruction, houses thousands of academic videos that are baked into guided, adaptive instruction.
The site is divided into different sections, each focusing on a different area of math and different grade levels.