• requires thinking  • is relevant and meaningful to each student

• takes time  to solve, develop, create, probe, try, problem solve, and decide  • requires the application of knowledge, skills and experience • has solutions which are not obvious • encourages creative AND multiple solutions • has “just the right” cognitive demand for each student - every student can experience success but only with effort - so determination and persistence matter • success criteria are clear point of success as is the effort required to find success.