Computer Science Unplugged
Drawing Lines with Pixels
How do the computers keep it straight? Using the provided algorithms, class members draw a line and a circle using pixels. They then check the drawings using a straight edge and compass to determine the accuracy of their...
Illustrative Mathematics
The Geometry of Letters
Use the alphabet as a tool for teaching your class about geometric figures. Break apart capital letters into line segments and arcs. Classify angles as right, acute, or obtuse. Identify parallel and perpendicular lines. An excellent...
Florida Center for Reading Research
Phoneme Challenge
This phonemic awareness game is very similar to the classic card game war; partners divide picture cards, each taking half (included). They place one card face-up at a time and segment the phonemes aloud. Whoever has the most phonemes...
Florida Center for Reading Research
Sound Spin
Here is a phoneme segmenting game which incorporates drawing for your more artistic learners. Assemble the spinner using a brad and lay out the picture cards face up. Partners take turns spinning to get either two, three, four, or five....
Illustrative Mathematics
Shortest Line Segment from a Point P to a Line L
One of the hardest skills for many young geometers to grasp is to move beyond just declaring obvious things true, and really returning to fundamental principles for proof. This brief exercise stretches those proving muscles as the...
Curated OER
Tangent Lines and the Radius of a Circle
Your Geometry learners will collaboratively prove that the tangent line of a circle is perpendicular to the radius of the circle. A deliberately sparse introduction allows for a variety of approaches to find a solution.
Florida Center for Reading Research
Phonological Awareness: Sentence Segmentation, Nursery Rhymes
What makes a complete sentence? Words, of course! As your budding readers understand this relationship, guide them through this nursery rhyme activity. Scholars examine pictures of 10 familiar rhymes, mentally counting the words in the...
Florida Center for Reading Research
Phonological Awareness - Phoneme Segmenting and Blending, Treasure Chest
Working in pairs, scholars use picture cards to practice segmenting words into phonemes and blending phonemes into words. When a peer answers correctly they place a penny in a treasure chest. Incorrect responses make the card go back in...
Florida Center for Reading Research
Phonological Awareness: Onset and Rime, Quick Pick
What does it begin with? In this engaging phonics game, small groups study onset and rime using picture cards. Groups take turns as one player draws three cards from an overturned pile, placing them face-up on the table. They silently...
Florida Center for Reading Research
Phonological Awareness: Phoneme Segmenting, Say and Slide Phonemes
Develop phonological awareness using this partner activity, where scholars segment words into phonemes. Using Elkonin Box picture cards, pairs practice orally segmenting sounds and physically representing the phonemes using counters....
Illustrative Mathematics
Two Wheels and a Belt
Geometry gets an engineering treatment in an exercise involving a belt wrapped around two wheels of different dimensions. Along with the wheels, this belt problem connects concepts of right triangles, tangent lines, arc length, and...
Illustrative Mathematics
Placing a Fire Hydrant
Triangle centers and the segments that create them easily become an exercise in memorization, without the help of engaging applications like this instructional activity. Here the class investigates the measure of center that is...
Teach Engineering
Matching the Motion
It is not always easy to walk the straight and narrow. In the sixth portion of a nine-part unit, groups actively recreate a graph depicting motion. Individuals walk toward or away from a motion detector while trying to match a given...
Illustrative Mathematics
Dilating a Line
High School geometers verify through experimentation certain properties about dilations. This multi-step problem challenges them to construct examples of dilations to verify specific facts, the final step provides an opportunity to more...
Florida Center for Reading Research
Phonological Awareness: Phoneme Segmenting and Blending, Picture Slide
A hands-on activity challenges young scholars to name a picture, segment its phonemes, then blend those sounds to make the word.
National Council of Teachers of Mathematics
Stitching Quilts into Coordinate Geometry
Who knew quilting would be so mathematical? Introduce linear equations and graphing while working with the lines of pre-designed quilts. Use the parts of the design to calculate the slope of the linear segments. The project...
Illustrative Mathematics
Points equidistant from two points in the plane
Young geometers apply their deductive reasoning skills and knowledge of proving triangles congruent in a task that asks them to prove if a point lies on the perpendicular bisector of a segment, then it is equidistant from the endpoints...
Curated OER
Unit Squares and Triangles
This is an interesting geometry problem. Given the figure, find the area of a triangle that is created by the intersecting lines. The solution requires one to use what he/she knows about coordinate geometry, as well as triangle...
Curated OER
Reflections and Equilateral Triangles II
Given the lines of symmetry in an equilateral triangle, your learners find where the pre-image vertices are mapped onto the new image. They explore the properties of equilateral triangles, the impact of reflections, and the...
Curated OER
Reflections and Equilateral Triangles
Your learners collaboratively find the lines of symmetry in an equilateral triangle using rigid transformations and symmetry. Through congruence proofs they show that they understand congruence in terms of rigid motions as they...
Illustrative Mathematics
Midpoints of the Sides of a Paralellogram
This task asks learners to prove that the segment joining the midpoints of two sides of a parallelogram is both congruent and parallel to an adjacent side of the parallelogram. The activity would be good to use in a discussion about how...
Illustrative Mathematics
Tangent to a Circle From a Point
Learners see application of construction techniques in a short but sophisticated problem. Combining the properties of inscribed triangles with tangent lines and radii makes a nice bridge between units, a way of using...
Illustrative Mathematics
Are They Similar?
Learners separate things that just appear similar from those that are actually similar. A diagram of triangles is given, and then a variety of geometric characteristics changed and the similarity of the triangles analyzed. Because the...
Florida Center for Reading Research
Phonological Awareness: Onset and Rime, Sound Detective
Play letter sound detective with your class, and snoop out sounds, onsets, blends, and rhyme. In pairs, children take turns choosing a card from the pile; as they sound out part of the word, their partner attempts to figure out which...
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