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For tutors and teachers

Good ideas, passed along.

Tools, reads and classroom ideas we've come across or been sent. Everything here is something we'd use ourselves, credited to the people who made it and the people who found it.

NewEngagementFreeElementary

Class Fish Tank

A classroom aquarium where every student has a fish that grows as they earn points. The teacher runs it from a laptop or a phone, and the tank goes up on the board.

The idea is simple: make effort visible, and make it a little bit silly. A teacher built it for her own Grade 2 class, and within a week parents were hearing about fish at dinner and kids were doing extra work to feed them. There are no student accounts, no ads, and only first names. It’s worth borrowing even if you only take the idea into a one-on-one session.

Jin, X Tutoring
Read the full write-up

What it is. Each student gets a fish. When you reward good work, the fish eats and grows. A daily leaderboard crowns the top three, and the tank resets at midnight so every day is a fresh start.

Why it works. Points on their own are abstract. A fish that is visibly bigger than yesterday is not. The daily reset matters too: nobody falls so far behind that they stop trying.

How a tutor might use it. Even with one student, a small visible reward for finishing practice problems or trying before asking can change the tone of a session, especially for younger kids.

Worth knowing. Free, works on any screen, in English, Spanish and Uzbek. Use nicknames if you’d rather not show names, and you can delete a class list at any time.

Visit Class Fish Tank

Made by a teacher and her family · Spotted on LinkedIn

desmos.comMathOnline tutoringFreeGrades 7–12

Desmos

The graphing calculator most Ontario students already know, plus ready-made classroom activities. In a session, sliders turn “what does changing a do?” into something a student can see in ten seconds.Made by Desmos StudioVisit ↗
cemc.uwaterloo.caMathEngagementFreeGrades 3–12

CEMC Problem of the Week

One good problem a week from the University of Waterloo, sorted into five grade bands, with full solutions. A great warm-up, or a stretch problem for the student who finishes early.Made by the University of Waterloo CEMCVisit ↗
polypad.amplify.comMathOnline tutoringFreeAll grades

Polypad

Virtual manipulatives: algebra tiles, fraction bars, number lines, geometry tools. It brings the hands-on part of math into an online session without a box of plastic pieces.Made by Mathigon, now part of AmplifyVisit ↗
phet.colorado.eduScienceMathFreeGrades 6–12

PhET Interactive Simulations

Free physics, chemistry and math simulations from the University of Colorado Boulder. Let a student change one variable and predict what happens before they touch the formula.Made by the University of Colorado BoulderVisit ↗
retrievalpractice.orgTeaching craftFree guides

Retrieval Practice

Cognitive scientist Pooja Agarwal’s guides on getting students to pull information out of memory instead of re-reading it. Short, practical, and backed by classroom research.Made by Pooja K. Agarwal, PhDVisit ↗
excalidraw.comOnline tutoringFree

Excalidraw

A clean shared whiteboard that opens in a browser with no sign-up. Send the student a link and you are both drawing on the same page in seconds.Open sourceVisit ↗
khanacademy.orgMathScienceFree

Khan Academy

Short videos and practice sets for almost every high school topic. Useful as homework between sessions, so the session itself can go to the parts a student actually finds hard.Made by Khan Academy, a nonprofitVisit ↗
edutopia.orgTeaching craftEngagementFree

Edutopia

Short, practical articles from teachers on what works in real classrooms: questioning, feedback, getting quiet students to talk. Good reading for a new tutor.Made by the George Lucas Educational FoundationVisit ↗
dcp.edu.gov.on.caTeaching craftMathFreeOntario

Ontario Curriculum and Resources

The official expectations for every Ontario course. When a student says “we haven’t learned that”, this is how you check what the course actually covers.Ontario Ministry of EducationVisit ↗

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