Free open-and-go interactives that inspire kids to love math!Keep exploringAlgebra 1Standard setClearHow did a crowd flatten the Golden Gate Bridge?Algebra 1 · Equations and inequalities · about 3 minCCSS HSA.CED.A.1 · CCSS HSA.CED.A.3How did a crowd weigh an ox?Algebra 1 · Statistics · about 2 minCCSS HSS.ID.A.2 · CCSS HSS.ID.A.3From one cell to youAlgebra 1 · Linear vs exponential · about 2 minCCSS HSF.LE.A.3 · CCSS HSF.LE.A.1.cHow did one graph show the universe is growing?Algebra 1 · Lines of fit · about 2 minCCSS HSS.ID.B.6.c · CCSS HSS.ID.C.7Why can't anyone stay in the air for two seconds?Algebra 1 · Quadratic functions · about 3 minCCSS HSF.IF.B.4 · CCSS HSF.IF.B.6Can you crack the spy's code?Algebra 1 · Functions · about 3 minCCSS HSF.BF.B.4.a · CCSS HSA.REI.B.3Why are so many deep-sea animals red?Algebra 1 · Exponential decay · about 3 minCCSS HSF.LE.A.1.a · CCSS HSF.LE.A.1.c