This maplet guides the student through a differentiation problem, step by step. The student can apply differentiation rules one at a time to a function f and view the resulting expression, for example, the sum rule (D(f+g) = D(f) + D(g)), the chain rule (D(f(g(x)) = D(f)(g(x))* D(g)(x)), and rules for special functions such as D(sin(x))=cos(x). When the user applies a rule, the Problem Status box is updated with the result of the applied rule. At any time, the user can request a hint for the next rule to apply, and then apply the hint. The user can also specify that a set of rules is understood, in which case those rules are automatically applied (when possible).