Company Clay Cat Designs created these great apps:
Algebra Level 1, Algebra Level 2, Algebra Level 3, Algebra Level 4, Math Level 1, Math Level 2, Math Level 3 - Word Problems, 380+ Sight Words, Grammar 2, Grammar 1, Phonics, Phonics Jr, Basic Braille, Spelling, Spelling Jr, Grammar - Contractions, Spelling Lists, Words - Homophones, Words - Homonyms, Words - Synonyms & Antonyms, AlgebraPad 1, AlgebraPad 2, AlgebraPad 3, AlgebraPad 4, MathPad 1 - Addition & Subtraction, MathPad 2 - addition/subtraction/multiplication/division, MathPad 3 - less than, greater than & equal to, MathPad 4 - Word Problems, MathPad 5 - Factoring, Phonics - Phonograms, Math - Sequences, Falling Words, Falling Algebra 1, Falling Math 1, Falling Algebra 2 - Polynomials, Algebra Level 5, Money - Learn To Count Money, Spelling Wheel, and others..