Interactivate

Search Interactivate
Shodor > Interactivate > Search Interactivate
Sets (Beginner) (Discussion)
Introduces elementary students to sets and elements using shapes.
Estimator (Activity)
Practice estimation skills by determining the number of objects, the length of a line, or the area of a shape. Parameters: error tolerance of estimate. Estimator is one of the Interactivate assessment explorers.
This worksheet is for use with the Estimator Four activity (http://www.shodor.org/interactivate/activities/EstimatorFour/).
Introduction to various estimation methods through the simulation of a forest fire.
A capstone lesson to allow students to build a working definition of fractal.
Caesar Cipher III (Activity)
Decode encrypted messages to determine the form for an affine cipher, and practice your reasoning and arithmetic skills. Input your guesses for the multiplier and constant. Caesar Cipher III is one of the Interactivate assessment explorers.
This worksheet is for use with the More or Less Estimator activity (http://www.shodor.org/interactivate/activities/MoreOrLessEstimator/).
Introduction of elementary set operations through internet searching.
Compare two sets of objects, using estimation to determine which is greater. Estimate a number of objects, the length of a line, or the area of a shape. Parameter: error tolerance. Comparison Estimator is one of the Interactivate assessment explorers.
Estimator Four (Activity)
Play a "Connect-Four" style game, earning a game piece each time you answer an estimation question correctly. This game asks the players to estimate the answer to addition, multiplication, and percentage questions. Choose difficulty level, question types, and time. Estimator Four is one of the Interactivate assessment games.
a resource from CSERD, a pathway portal of NSDL NSDL CSERD