Learning isn't a random process. A well-designed interactive lesson helps classes make key conclusions about stratified random sampling. They calculate group percentages and use those percentages to decide on sampling totals.

You're never too young to learn about banking and personal finance. Use a set of seven banking lessons to teach middle schoolers about checking and savings accounts, interest rates, loans and credit cards, and safety deposit boxes.

Learners survey each other and determine their common interests. They examine the use of algorithms by various websites that are used to develop networks of interest groups among users. They then design proposals for a social networking...