How do you know if a pair of triangles are congruent? Use the lesson plan to help class members become comfortable identifying the congruence criteria. They begin with an exploration of ASA and SSS criteria through transformations and...

Playing with mathematics can invoke curiosity and excitement. As pupils construct triangles with given criteria, they determine the necessary requirements to support similarity. After determining the criteria, they practice...

While it may seem incredibly obvious to the geometry student that congruent sides make congruent triangles, the proving of this by definition actually takes a bit of work. This exercise steps the class through this kind of proof by...

Students explore the concept of congruent triangles.  In this congruent triangles activity, students use Cabri Jr. to construct two congruent triangles using circles.  Students determine if the two triangles are congruent by...

Students explore the concept of similarity and congruence. In this similarity and congruence lesson plan, students cut out strips of paper and form a triangle. Students try to prove that their triangles are congruent using the SSS...

What letter is this? As you introduce pre-readers to letter sounds, keep them entertained with this fun game. Start by drawing the letter s on the board, large enough for all to see. Once you've demonstrated the sound it makes, use...

Students investigate triangles and their properties. In this geometry lesson, students differentiate between similar and congruent triangles. They use the SSS theorem to help identify the triangles that are similar or congruent.

Tenth graders explore congruent triangles.  In this geometry lesson plan, 10th graders investigate the conditions necessary to prove two triangles are congruent by SSS, ASA, AAS, or SAS. 

Students explore the concept of similarity and congruence. In this similarity and congruence lesson, students identify and verify whether or not two figures are similar, congruent, or neither. Students use postulates and theorems such as...

Students explore the /s/ sound and identify the /s/ sound while reading. They read a tongue twister which emphasizes the /s/ sound and sss like a snake when they come to a /s/ sound. They listen to "The Stray Dog" and make finger...

A thorough lesson plan takes your first grade class through Jane Yolen's beautiful Owl Moon. It crafts the unit with clear objectives, high-level guiding questions, cloze activities and sentence frames, and extension...

Recipes, tasting activities, images of fruits and veggies, fun food facts... you name it, this resource has it! Your class will be cooking up wonderful dishes in no time with these materials. Included here are recipes, handouts,...

In this congruent triangles worksheet, high schoolers solve four multiple choice problems. Students determine which statement is the appropriate reasoning to say that two triangles are congruent.

Your learners will make good use of the Socratic method in a collaborative task that begins with an assumed solution and ends with deeper understanding of the idea of determining two triangles congruent.

Clamp onto the resource and don't let go. Future mechanical engineers produce a pipe clamp from a sheet of metal. This idea is to use the pipe clamp to affix a pull-up bar in a doorway.

How can you prove it? Guide classes through an exploration of two possible triangle congruence criteria: AAS and HL. Learners connect this criteria to those previous learned and also explore criteria that does not work. The lesson...

Middle schoolers work in small groups to make various geometric solids with Play-Doh. They use fishing line to make cuts and observe the shapes of the cross-sections. Pupils complete an assessment in which they answer questions such as:...

Young scholars discover the relationship between the circumference of a circle and its diameter. They find the length of an arc of a circle.Students use estimation strategies in real-world applications to predict results (i.e.,...

Students investigate the area of squares and circles. In this geometry lesson, students calculate the area and probability of simple events. They work on a laptop using Safari.

Get pre-readers comfortable with phoneme substitution using these helpful letter cards, which are printable in three different sizes depending on your classroom needs. Once scholars understand some letter sounds, they can begin...

Emergent readers create new words by changing a phoneme, using sets of letter cards to spell out each CVC word. They begin by substituting initial sounds, then final sounds, and lastly the middle vowel. Help them sound out each word,...

What words end with /x/? Unite several alphabet concepts as scholars learn all about the letter x. After identifying it, they listen to you pronounce the /x/ sound and try it themselves (use these tips to explain how you do this)....

The problem seems simple: find the area of the equilateral triangle whose sides are each length 1. In fact, this same problem is solved in 8th grade, addressing a different Common Core standard, using the formula for area of a triangle...

Carlos Fuentes’s The Diary of Frida Kahlo: An Intimate Self-Portrait and Jaspre Bark’s Journal of Inventions: Leondardo da Vince serve as models for an assignment that asks class members to create a personal journal they will use...