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- Solid graphing
- The students will review solid figures using a baggie of assorted snack mix (cones, cubes, cylinders, and spheres) and will begin a vertical bar graph showing the number of each solid figure in a bag of assorted snack mix.
- Format: lesson plan (grade 2–3 Mathematics)
- By Lisa Fletcher.
Resources on the web
- Comparison estimator
- This activity allows the user to compare two quantities (which may be the number of objects in each of two sets, the lengths of two curves, or the area of two shapes) by estimating. (Learn more)
- Format: activity/lesson plan (grade K–12 Mathematics)
- Provided by: Shodor
- Estimator
- This activity allows users to practice estimation skills by attempting to determine the number of individual objects shown, estimating the length of a curve based upon a given scale or estimating the area of a shape also based upon a given scale. (Learn more)
- Format: activity/lesson plan (grade K–12 Mathematics)
- Provided by: Shodor
- More or less estimator
- This activity allows the user to estimate quantities and sizes including the number of objects in a set, the lengths of a curve, and the area of a shape (Learn more)
- Format: activity/lesson plan (grade K–12 Mathematics)
- Provided by: Shodor

