Company Susan Chen created these great apps:
Sumtate, Jumptate, Pairtate, Bridgetate, Keytate, Pairtate Junior, Mindtate, Reaptate, Logic28, VHSum, MathFourOps, StarSum, Graduate Exponent, Whirltate-0, Whirltate-1, Whirltate-2, Graduate Function Practice, Graduate Sequence and Set Practice, Graduate Number Operation Practice, Graduate Equation Practice, TroveMath 1 Number Operation Practice, TroveMath 2 Number Operation Practice, TroveMath 3 Number Operation Practice, TroveMath 4 Number Operation Practice, TroveMath 5 Number Operation Practice, TroveMath 6 Number Operation Practice, Reaptate 40 S, and others..