Number Explorer
Explore number charts and place value with visual models.
Open tool (opens in a new tab)THE FREE ROJI TOOLBOX / STUDENTS
Big ideas.
Tools to explore them.
Practice something new, make sense of a tricky concept, or plan your next small win.
16 free toolsNo signup neededMade for curious minds
Meet your free Roji toolbox
FIND YOUR NEXT LITTLE HELPER
Your student toolbox
16 tools to explore
Math Facts Trainer
Practice addition, subtraction, multiplication, and division.
Open tool (opens in a new tab)Bar Model Builder
Make word problems easier to understand with visual bars.
Open tool (opens in a new tab)Find My Mistake
Review your math steps and work through common mistakes.
Open tool (opens in a new tab)Unit Converter
Convert measurements and follow the units through each step.
Open tool (opens in a new tab)Balance It Yourself
Practice balancing chemical equations one step at a time.
Open tool (opens in a new tab)Sig Figs & Scientific Notation
Work with significant figures and scientific notation.
Open tool (opens in a new tab)Writing Checkup
Review your writing and find opportunities to improve it.
Open tool (opens in a new tab)Flashcard Maker & Review
Create flashcards and review what you’re learning.
Open tool (opens in a new tab)Test Countdown Study Planner
Break study time into a plan leading up to your next test.
Open tool (opens in a new tab)My Grade & GPA Calculator
Explore your grades and calculate a grade point average.
Open tool (opens in a new tab)No tools match that search. Try another name or category.
Curiosity goes both ways.
Discover the free tools in our teacher collection.
Explore teacher tools →