Lesson pack
Integrals pack
An integrals unit needs n you can drag, a method comparison, a u that you pick, and the FTC evaluated in order. Put these four on one class page.
Copy each snippet onto one class page. The front door is widgets. Host steps: Google Sites. Classroom notes: teachers.
Riemann sum slider
Drag the rectangle count from 1 to 200 and watch a left, right, midpoint, or trapezoidal Riemann sum converge to the exact integral as its error vanishes.
Riemann sum visualizer
Enter a function, interval, and n, then watch left, right, midpoint, and trapezoidal rectangles build a definite-integral estimate and see the exact error.
U-substitution helper
Practice choosing u for u-substitution. Pick a candidate, watch the tool compute du and rewrite the integral, and get a hint when a choice fails.
FTC step tool
The Fundamental Theorem of Calculus in three honest steps: find an antiderivative, evaluate at both bounds, subtract. What FTC evaluation really means.