National Council of Teachers of Mathematics
The Math Forum: Exploring Ocean Data Lesson Plan
Find "oceans of data" for students of all ages. NCTM, California, and Philadelphia standards are listed for each grade level along with lesson plans and other website resources.
Better Lesson
Better Lesson: Whose Piece Is Larger?
Fourth graders are always concerned about whether they get their equal piece when things are divided. In this lesson, 4th graders will use fraction bars to visually see how to compare fractions