Fact Family Trees - lakeshorelearning.com · • Fact Family Work Mat • Tree trunk template •...
7
1st–2nd Grade Objective • Students will identify addition and subtraction fact families to 10. Materials Needed • Unifix® Cubes (or other linking cubes) • Whiteboard or chart paper • Marker • Fact Family Work Mat • Tree trunk template • Apples template • Baskets template • Construction Paper - 9" x 12" (brown, red and green) • Construction Paper - 12" x 18" (light blue) • Scissors • Glue Preparation Reproduce the tree trunk template on brown construction paper, the apples template on red construction paper, and the baskets template on green construction paper. Each student needs one tree trunk, one set of four apples, and one basket. Introduction Introduce or review the concept of fact families with your students. Tell students that understanding fact families can help them remember related math facts. Use three linking cubes to demonstrate a fact family. Say, “If you know that 1 (hold up one cube) + 2 (attach the other two cubes) = 3, then it’s easy to remember that 2 + 1 = 3 (continue to demonstrate with the cubes), that 3 – 2 = 1, and that 3 – 1 = 2. They’re all related!” Write the four equations on the board or chart paper to reinforce the concept. Procedure 1. Give each student seven cubes and a Fact Family Work Mat. 2. Write 3 + 4 on the board or on chart paper. Ask students to place three linked cubes in the first circle and four linked cubes in the second circle on their mats. 3. Ask, “What does 3 + 4 equal?” 4. Invite students to share their answers. Then write = 7 on the board to complete the equation. 5. Explain that you are now going to switch the first two numbers in the equation. Beneath the first equation, write 4 + 3. Ask students to build the new equation on their mats by placing 4 cubes in the first circle and 3 in the second circle. Invite students to share their answers and write = 7 on the board. 6. Discuss the fact that both equations have the same answer. 7. Write 7 – 4 on the board. Ask students to put seven linked cubes in the first circle. Then ask them to remove four cubes. How many are left? Add = 3 to the equation on the board. ©Lakeshore www.lakeshorelearning.com Gabe
Transcript of Fact Family Trees - lakeshorelearning.com · • Fact Family Work Mat • Tree trunk template •...
1st–2nd GradeObjective• Studentswillidentifyadditionandsubtractionfact
familiesto10.
Materials Needed• Unifix®Cubes(orotherlinkingcubes)• Whiteboardorchartpaper• Marker• FactFamilyWorkMat• Treetrunktemplate• Applestemplate• Basketstemplate• ConstructionPaper-9"x12"(brown,redandgreen)• ConstructionPaper-12"x18"(lightblue)• Scissors• Glue
PreparationReproducethetreetrunktemplateonbrownconstructionpaper,theapplestemplateonredconstructionpaper,andthebasketstemplateongreenconstructionpaper.Eachstudentneedsonetreetrunk,onesetoffourapples,andonebasket.
IntroductionIntroduceorreviewtheconceptoffactfamilieswithyourstudents.Tellstudentsthatunderstandingfactfamiliescanhelpthemrememberrelatedmathfacts.
Usethreelinkingcubestodemonstrateafactfamily.Say,“Ifyouknowthat1(holduponecube)+2(attachtheothertwocubes)=3,thenit’seasytorememberthat2+1=3(continuetodemonstratewiththecubes),that3–2=1,andthat3–1=2.They’reallrelated!”
Writethefourequationsontheboardorchartpapertoreinforcetheconcept.
Procedure 1. GiveeachstudentsevencubesandaFactFamilyWorkMat.
2. Write3+4ontheboardoronchartpaper.Askstudentstoplacethreelinkedcubesinthefirstcircleandfourlinkedcubesinthesecondcircleontheirmats.
3. Ask,“Whatdoes3+4equal?”
4. Invitestudentstosharetheiranswers.Thenwrite=7ontheboardtocompletetheequation.
5. Explainthatyouarenowgoingtoswitchthefirsttwonumbersintheequation.Beneaththefirstequation,write4+3.Askstudentstobuildthenewequationontheirmatsbyplacing4cubesinthefirstcircleand3inthesecondcircle.Invitestudentstosharetheiranswersandwrite=7ontheboard.
6. Discussthefactthatbothequationshavethesameanswer.
7. Write7–4ontheboard.Askstudentstoputsevenlinkedcubesinthefirstcircle.Thenaskthemtoremovefourcubes.Howmanyareleft?Add=3totheequationontheboard.
©Lakeshore www.lakeshorelearning.com
Gabe
©Lakeshore www.lakeshorelearning.com
8. Askstudentsiftheynoticeanythingaboutthenewequation.Discussthefactthat3and4togetherequal7,sowhenstudentstake4cubesfrom7,thereare3left.
9. Workwithstudentsinthesamewaytofindtheanswerto7–3.
10.Concludethelessonbyexplainingthatagroupofrelatedadditionandsubtractionproblemslikethisoneiscalledafactfamily.Ifstudentsknowoneofthefacts,theotherfactsinthefamilywillbeeasytorecall.
11.Ifnecessary,repeatthelessonwithdifferentfactfamiliesuntilstudentsunderstandtheconcept.Thengivestudentsthreenumbersthatmakeupafactfamily,andaskstudentstoworkinpairstofigureoutthefourequations.Askstudentstosharethefourequationswiththeclass.Writethemontheboardorchartpaper.
Independent Practice 1. Giveeachstudentatreetrunktemplateanda12"x18"sheetoflightblueconstructionpaper.Instruct
studentstocutoutthetrunkandglueittothelightbluepaper.
2. Inviteeachstudenttochooseabasketwithafactfamilyprintedonit.Havestudentsgluetheirbasketstothebottomsofthetreetrunks.
3. Giveeachstudentasetoffourapples.Promptthemtowritethefourequationsintheirfactfamilyontheapples.Thenhavestudentsgluetheapplestotheirtrees.
4. Displaythetreesonabulletinboardtitled“FallFactFamilyTrees!”
©Lakeshore
www.lakeshorelearning.com
_ +_ =_ _ +_ =_
_ –_ =_ _ –_ =_
2
1
2
4
3
5
3
7
5
2
6
3
5
8
7
6
9
8
1
3
4
1
5
7
6
3
6
10
10
4
