Pre-K-2, 3-5
This tool allows you to practice multiplying single-digit numbers.
6-8, 9-12
Use this applet to investigate how changes in the scale factor influence
the ratio of perimeters and the ratio of areas between two figures.
6-8
This applet proves the Pythagorean Theorem "without words" using geometry.
9-12
This applet gives a proof of completing the square "without words" using geometry.
3-5, 6-8
This applet is the Product Game: a fun, interactive game that exercises your skill with factors and multiples.
3-5, 6-8
Find your personal number using your birthday! It is the month + date + year & month × date × year.
9-12
In this lesson,
students examine and draw representations of cubes and then learn how to analyze
these representations using complex numbers. Students use what they know about
operations on complex numbers to see if a drawing is an accurate representation
of a cube. They also learn how to generate complex numbers that will produce
such representations.
Pre-K-2
This activity provides opportunities for creative problem solving while
encouraging young students to estimate length and angle measure. Using
the Turtle Pond Applet,
students enter a sequence of commands to help the turtle get to the
pond. Children can write their own solutions using LOGO commands and
input them into
the computer. The turtle will then move and leave a trail or path
according to the instructions given.
3-5
Los estudiantes son inspirados a descubrir todas las combinaciones posibles de trajes que consisten de pantalones cortos y camisas. Los estudiantes ejercitan actividades para resolver problemas (incluyendo eliminacion y coleccion de datos organizados) a hacer sus conclusiones.
9-12
Sea gulls and crows feed on various types of mollusks by
lifting them into the air and dropping them onto a rock to break open
their shells. Biologists have observed that northwestern crows
consistently drop a type of mollusk called a whelk from a mean height of
about 5 meters. The crows appear to be selective; they pick up only
large-sized whelks. They are also persistent. For instance, one crow was
observed to drop a single whelk 20 times. Scientists have suggested
that this behavior is an example of decision-making in optimal foraging.
