Gallery
Discover apps people built on Collabby by chatting. Run them, then remix to make them yours.
Probability
Put red and blue balls in the bag to name the chance in words and as 0, 1/2, or 1, then compare two bags on the same scale.
by Anonymous
Ratio and Proportion
Mix blue and yellow to build the ratio a:b, then discover how multiplying both parts gives equivalent ratios with the same value.
by Anonymous
Percentages
Color 100 squares to link percentages with fractions and decimals, and use bar models to find discounted prices.
by Anonymous
Saltwater Concentration (Dilution & Evaporation)
Set the concentration (%) of a salt solution, then add water or let it evaporate to see how the unchanging mass of salt determines the new percentage.
by Anonymous