bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGEMBANGAN VIDEO PEMBELAJARAN UNTUK MENINGKATKAN KETERAMPILAN PROSES SAINS SISWA IPA SMP KELAS VII
Authors: Nuha Ulin , Sari Novilia Mita , Utomo Anjar Putro , Wahyuni Sri 
Published: April 2023

Penelitian ini bertujuan untuk meningkatkan keterampilan proses sains dengan mengembangkan video pembelajaran untuk materi IPA SMP kelas VII yaitu materi interaksi makhluk hidup dengan lingkungannya. Metode penelitian yang digunakan adalah Research and Development (R&D) dengan menggunakan desain pengembangan ADDIE. Hasil validasi menunjukkan bahwa video pembelajaran yang dikembangkan tergolong dalam kategori sangat baik dan tidak perlu direvisi dengan skor dari masing-masing validator yaitu: (1) 87,5%; (2) 92,5%; dan (3) 97,5%). Hasil keefektifan video berdasarkan data angket siswa menujukkan: (1) sangat setuju sebesar 25,6%; (2) setuju sebesar 59,3%; dan (3) tidak setuju sebesar 15%. Hasil perhitungan N-Gain menunjukkan bahwa keterampilan proses siswa setelah menggunakan video pembelajaran berada pada kategori tinggi (28,1%), kategori sedang (59,4%), dan rendah (12,5%). Secara keseluruhan keterampilan proses sains siswa meningkat sebesar 79%. Kesimpulan dari penelitian ini adalah video pembelajaran yang dikembangkan dapat dikatakan valid, efektif, dan mampu meningkatkan keterampilan proses sains siswa.
Kata Kunci: Pengembangan, Video Pembelajaran, Keterampilan Proses Sains
PENGARUH WAKTU PENYIMPANAN DAN VARIASI KEMASAN TERHADAP NILAI SUHU DAN KUALITAS FISIK SAWI
Authors: Indreswari Meilody , Nafiusokhib Nafiusokhib , Ahmad Salman 
Published: April 2023

Perlakuan dan pengemasan sayuran basah seperti sawi selama proses pengiriman dari petani sampai ke konsumen sangat mempengaruhi kualitas sawi. Agar sawi bisa tahan lebih lama dibutuhkan bahan yang tepat sebagai media pengemas sayuran sawi. Kemasan yang bagus untuk sayuran pengganti plastik adalah daun pisang dan daun jati. Penelitian ini kami membandingkan antara pengemasan dengan daun pisang, daun jati dan tanpa ada kemasan. Perlakuan kemasan di kardu dan di luar kardus. Hasil penelitian diperoleh sawi dengan perlakuan di dalam kardus dengan kemasan daun pisang mengalami pembusukan dalam waktu 7 hari, daun jati 5 hari sedangkan tanpa bungkus selama 4 hari. Suhu akhirnya adalah 30,5 oC pada kemasan daun jati dan daun pisang sedangkan yang tanpa kemasan suhunya 29,5 oC. Sawi dengan perlakuan diluar kardus dengan kemasan daun pisang mengalami pembusukan dalam waktu 6 hari, daun jati 4 hari dan tanpa bungkus hanya 3 hari. Suhu akhirnya 29,5 oC pada daun pisang dan daun jati sedangkan yang tanpa kemasan 28,5 oC. Dari hasil yang diperoleh perlakuan didalam kardus dan dengan menggunakan kemasan daun pisanglah yang memiliki usia pembusukan yang lama.
PENGEMBANGAN E-MODUL MENGGUNAKAN 3D PAGEFLIP PROFESSIONAL UNTUK MEREMEDIASI MISKONSEPSI SISWA SMP PADA MATERI TEKANAN ZAT CAIR
Authors: Amelia Elga Amelia , Maison Maison , Kamid Kamid 
Published: April 2023

Tujuan penelitian ini untuk mengembangkan e-modul pada materi tekanan zat cair untuk meremediasi miskonsepsi siswa. Jenis penelitian ini adalah penelitian pengembangan dengan menggunakan model ADDIE. Teknik pengumpulan data menggunakan angket untuk validator, guru dan siswa serta tes diagnostik four tier. Uji efektivitas didapatkan dari analisis hasil pre-test dan post-test siswa berdasarkan kriteria pengambilan keputusan Four tier diagnostic test. Berdasarkan hasil validasi terhadap pengembangan e-modul oleh ahli materi dan ahli media dinyatakan layak, sedangkan hasil respon guru diperoleh persentase 85,71% dalam kategori sangat baik, hasil respon siswa pada ujicoba satu-satu diperoleh persentase 92,67% dalam kategori sangat baik, hasil respon siswa pada ujicoba kelompok kecil diperoleh persentase 88,41% dalam kategori sangat baik. Hasil uji efektifitas siswa mengalami penurunan miskonsepsi dengan signifikan dengan rata-rata persentase sebesar 52%. Hasil uji nonparametrik Wilcoxon menunjukkan hasil z = -2,673 dan Asymp.sig (2-tailed) bernilai 0,008, maka disimpulkan terdapat perbedaan yang signifikan antara nilai pre-test dan post-test siswa, sehingga dapat disimpulkan bahwa penggunaan emodul efektif dalam meremediasi miskonsepsi siswa SMP dan berdasarkan nilai effect size sebesar r=0,63 yang artinya penggunaan emodul memiliki efek sedang (moderate effect) dalam meremediasi miskonsepsi siswa pada materi Tekanan zat cair.
Pengembangan Kurikulum PAI sebagai Solusi dalam Implementasi Pendidikan Karakter di Sekolah
Authors: Munir Misbahul , Jannah Maulidatul 
Published: April 2023

Konteks penelitian ini adalah: pengembangan kurikulum diyakini diduga kuat sebagai solusi dalam mengatasi problematika implementasi pendidikan karkater di Sekolah.
Tujuan penelitian ini adalah mendeskripsikan Pengembangan tujuan kurikulum PAI dan Budi Pekerti, Pengembangan isi/materi kurikulum PAI dan Budi Pekerti,Pengembangan strategi kurikulum PAI, dan Pengembangan evaluasi kurikulum PAI dan Budi Pekertisebagai solusi implementasi pendidikan karakter.
Penelitian ini menggunakan pendekatan kulitatif deskriptif.Jenis penelitiannya adalah library Research.Sumber datanya menggunakan sumber data primer dan sekunder.Teknik pengumpulan datanya adalah observasi dan studi dokumentasi.Analisis datanya adalah analisis kualitatif deskrptif dengan tiga komponen yaitu reduksi data, penyajian data, dan penarikan kesimpulan.Mengecek keabsahan data menggunakan triangulasi data sumber, metode, dan teori.
Kesimpulan penelitian ini adalah:Pertama, Pengembangan Tujuan Kurikulum PAI dan Budi PekertiSebagai Solusi Implementasi Pendidikan Karakter di Sekolahmengacu pada Pertma, Tujuan pendidikan Nasional Tujuan pendidikan Nasional adalah tujuan pendidikan yang tercantum Dalam UU Sisdiknas No. 20 Tahun 2003, Kedua, Tujuan Institusional adalah tujuan yang harus dicapai oleh setiap lembaga pendidikan, ketiga, Tujuan Kurikuleradalah tujuan yang harus dicapai oleh setiap bidang studi atau mata pelajaran dalam hal ini tujuan pendidikan agama Islam dan budi pekerti.Kedua,Pengembangan isi/ materi kurikulum PAI dan Budi Pekerti sebagai solusi implementasi pendidikan karakter di sekolah meliputi: materi fiqh, akidah akhlak, al-Qur’an hadits, SKI. Materi fiqh berupa fiqh Ibadah, Fiqh Munakahat, Fiqh mu’amalah, fiqh jinayah, fiqh Nisa’, dan Fiqh mawarits. Akidah akhalaq: berupa akhlaq kepada Allah, akhlaq kepada sesama, dan akhlaq kepada alam. Al-qur’an hadits berupa semua ilmu-ilmu yang berkaitan dengan al-Qur’an dan hadits. SKI berupa sejarah yang berkaitan dengan Keislaman mulai dari sejarah peradaban islam, sejarah pendidikan Islam, sejarah social pendidikan Islam, dan semua kajian sejarah yang berkaitan dengan sejarah Islam. Ketiga, Pengembangan Startegi/Metode Kurikulum PAI dan Budi Pekerti Sebagai Solusi Implementasi Pendidikan Karakter di Sekolah pada umumnya meliputi: Strategi pembelajaran yaitu memberi tambahan kegiatan keagamaan.
Efektifitas Pengembangan Bahan Ajar
Authors: Burhanuddin Ainur Rahman , Rizqi Fauzi Azq. Haqiqi 
Published: April 2023

Kurikulum 2013 mengamanatkan bahwa terdapat satu pendekatan pembelajaran yang harus digunakan oleh seorang guru dalam proses pembelajaran yaitu pendekatan saintifik. Dalam prakteknya akan muncul permasalahan, terutama pada pelaksanaan kegiatan tahap pertama yaitu kegiatan mengamati. Pada kegiatan tersebut sangat dibutuhkan objek yang bisa diamati. Selama ini yang dijadikan objek pegamatan adalah buku teks melalui proses membaca, tidak sebagaimana mapel sains dengan objek yang kongkret. Berdasarkan latar belakang diatas, peneliti dapat mengetahui permasalah pengembangan buku ajar PAI berbasis saintifik pada materi meneladani perjuangan dakwah Rasulullah SAW di Madinah.
Penelitian ini menggunakan penelitian dan pengembangan (Research and Development), sebuah strategi proses atau langkah-langkah untuk mengembangkan produk baru atau menyempurnakan produk yang sudah ada. Dengan beberapa tahapan: Melakukan analisis produk yang akan dikembangkan, Mengembangkan produk awal, Validitas ahli dan revisi, Uji coba lapangan skala kecil dan revisi produk, dan Uji coba lapangan skala besar dan revisi akhir. populasi adalah siswa kelas X IPS 3 SMAN 1 Asembagus dengan jumlah 32 siswa. Teknik pengumpulan data yang digunakan adalah tes dan nontes. Teknik analisis data yang digunakan adalah analisis produk buku ajar, analisis kuantitatif uji t-test dan uji gain.
Hasil penelitian menunjukkan bahwa (1) Buku ajar berbasis Saintifik memenuhi kriteria layak untuk digunakan dalam kegiatan pembelajaran merujuk pada hasil validasi penilaian para pakar materi dan pakar media, (2) Media pembelajaran berupa buku ajar berbasis saintifik dapat dikatakan efektif digunakan dalam kegiatan pembelajaran, berdasarkan penilaian para pakar dan hasil belajar siswa.
Nilai-Nilai Pendidikan Karakter dalam Peristiwa Isra Mikraj Perspektif Al Qur’an Dan Hadis Sahih
Authors: Surur Miftahus 
Published: April 2023

Telling story is one of the most effective learning methods. Stories are very interesting to listen and the lessons can deeply penetrate into the soul. Therefore, the Qur'an encourages Islamic people to take lessons from the stories of the previous people in the pass, as in Yusuf verse 111. Likewise, stories based on historical events of the Prophet Muhammad ﷺ, such as the story of Isra’ Mi’raj. The Isra’ Mi’raj event contains various lessons about good values ​​and good character that are very important for character education for Muslims.
This study aims to describe the good values ​​of character education contained in the Isra’ Mi’raj event in a review of the Qur'an and Sahih Hadith. The type of research used in this study is library research with an interpretive approach and a historical research approach along with content analysis as the analysis technique.
The data was obtained from the literature on the interpretation of the Qur'an and Sahih Hadith. This research is library research with an interpretive approach and a historical research approach along with content analysis as the analysis technique. The data is obtained from the literature on the interpretation of the Qur'an and Sahih Hadith. The Qur'an describes the events of Isra’ Mi’raj in outline, while the Hadith describes it in detail in the frame of a story according to the chronology of events experienced by the Prophet. Isra is the journey of Prophet Muhammad ﷺ from Masjid al Haram to Masjid al Aqṣa at night.
STRATEGY TO IMPROVE EDUCATION QUALITY THROUGH GIVING REWARDS TO STUDENTS AT MIN 6 NGANJUK
Authors: Yusuf Muhammad , Vianti Mala Khafita 
Published: April 2023

Abstract

In the era of globalization, improving the quality of competitive education is very necessary. All problems in education such as not focusing on learning, declining student enthusiasm and so on are challenges for school principals, educators and parents. Therefore, the provision of giving rewards is expected to improve the quality of education. This study focuses on strategies to improve the quality of education through rewards to students along with supporting and inhibiting factors in its implementation. This research uses a qualitative approach with a descriptive type of research. The results of the study show that the strategy for improving the quality of education through the provision of rewards refers to input (preparation of teacher human resources), process (class division, procurement of extracurricular and tutoring, giving rewards that have applied the principles and meet the requirements), output (rewards foster student enthusiasm, and assessment can create output according to the educational goals of the institution) with various supporting factors such as the involvement of several parties, adequate infrastructure, student motivation and sufficient funds. And the obstacles to its implementation are poor time management, urgent interests in school, lack of concern for some students, and lack of full support from parents. Overcome by paying attention to teachers, students and parents who can support the implementation of school activities. And with the implementation of this strategy, the educational process makes it easier for teachers to deliver subject matter, the direct results of education are in the form of student behavior after attending lessons, and the final result of education is the behavior of graduates.
孤立性特発性腹腔動脈解離に続発した解離性脾動脈瘤破裂の2例(Ruptured dissected splenic artery aneurysms secondary to isolated spontaneous celiac artery dissection: a report of two cases)
Authors: 俊樹 佐藤 , 飛鳥 土谷 , 智哉 西野 , 誠司 守田 , 儀英 中川 , 達也 関口 , 淳 小泉 
Published: April 2023

要旨【症例1】52歳の男性。腹痛を主訴に近医を受診したところ，腹部造影CTで急性膵炎および脾動脈瘤破裂と診断され当院紹介となった。当院CTでは腹腔動脈起始部の解離と仮性動脈瘤を認めた。血管内治療を試みたが，脾動脈遠位の屈曲・蛇行が強く，金属コイルとNBCA併用による近位塞栓で終了とした。不完全塞栓であったため最終的には手術治療を要した。【症例2】53歳の男性。受傷2日前に突然の腹痛を自覚。受傷当日，乗用車運転中に意識消失し対向車と正面衝突し搬送となった。来院時ショック状態であり，腹部超音波検査では腹腔内液体貯留を認め，造影CTでは腹腔動脈起始部より脾動脈遠位に至る偽腔開存型解離および解離性脾動脈瘤破裂と周囲血腫を認めた。腹腔動脈起始部は正中弓状靱帯圧迫症候群により狭小化していた。血管内治療を施行したところ，脾動脈解離の真腔は偽腔に圧排され完全閉塞し，偽腔より横隔脾間膜内への造影剤漏出を認めた。偽腔の近位・遠位を金属コイルで塞栓し止血を得た。経過観察後のCTでは脾門部に仮性動脈瘤の出現を認め，金属コイル・NBCA塞栓術を追加し根治し得た。孤立性特発性腹腔動脈解離に伴う解離性脾動脈瘤破裂は非常に稀ではあるが，内因性腹部出血の鑑別の一つとして考慮すべきであり，発症様式や全身状態により各施設で最適な止血方法を選択する必要がある。
Self‐Healable, Regenerable, and Degradable Dynamic Covalent Nitroalcohol Organogels
Authors: Qi Yunchuan , Ayinla Mubarak , Sobkowicz Margaret J. , Ramström Olof 
Published: April 2023

AbstractDynamic covalent gels are synthesized from an aromatic trialdehyde and α,ω‐dinitroalkanes via the nitroaldol reaction in organic solvents. The gelation process can be fine‐tuned by changing the starting nitroalkanes, solvents, feed concentration, catalyst loading, or reaction temperature. The resulting organogels demonstrate good structural integrity and excellent self‐healing ability. Intact xerogels are produced upon drying, without damaging the network, and the solvent‐free network can recover its gel form in the presence of an organic solvent. Furthermore, the crosslinked dynameric gel depolymerize to small molecules in response to excess nitromethane.
A Suite of Mouse Reagents for Studying Amelogenesis
Authors: Wald Tomas , Verma Adya , Cooley Victoria , Marangoni Pauline , Cazares Oscar , Sharir Amnon , Sandoval Evelyn J. , Sung David , Najibi Hadis , Drennon Tingsheng Yu , Bush Jeffrey O. , Joester Derk , Klein Ophir D. 
Published: April 2023

SUMMARYAmelogenesis, the formation of dental enamel, is driven by specialized epithelial cells called ameloblasts, which undergo successive stages of differentiation. Ameloblasts secrete enamel matrix proteins (EMPs), proteases, calcium, and phosphate ions in a stage-specific manner to form mature tooth enamel. Developmental defects in tooth enamel are common in humans, and they can greatly impact the well-being of affected individuals. Our understanding of amelogenesis and developmental pathologies is rooted in past studies using epithelial Cre driver and knockout alleles. However, the available mouse models are limited, as most do not allow targeting different ameloblast sub-populations, and constitutive loss of EMPs often results in severe phenotype in the mineral, making it difficult to interpret defect mechanisms. Herein, we report on the design and verification of a toolkit of twelve mouse alleles that include ameloblast-stage specific Cre recombinases, fluorescent reporter alleles, and conditional flox alleles for the major EMPs. We show how these models may be used for applications such as sorting of live stage specific ameloblasts, whole mount imaging, and experiments with incisor explants. The full list of new alleles is available athttps://dev.facebase.org/enamelatlas/mouse-models/.
Supplemental Table S1 from ATR Inhibitors VE-821 and VX-970 Sensitize Cancer Cells to Topoisomerase I Inhibitors by Disabling DNA Replication Initiation and Fork Elongation Responses
Authors: Jossé Rozenn , Martin Scott E. , Guha Rajarshi , Ormanoglu Pinar , Pfister Thomas D. , Reaper Philip M. , Barnes Christopher S. , Jones Julie , Charlton Peter , Pollard John R. , Morris Joel , Doroshow James H. , Pommier Yves 
Published: April 2023

<p>Supplemental Table S1. RSA generated p-values are listed along with corresponding false discovery rates (FDR)*. *Benjamini, Yoav; Hochberg, Yosef (1995). "Controlling the false discovery rate: a practical and powerful approach to multiple testing". Journal of the Royal Statistical Society, Series B (Methodological) 57 (1): 289-300.</p>
Supplementary Figures 1 - 9, Tables 1 - 6 from Identification of Prognostic Groups in High-Grade Serous Ovarian Cancer Treated with Platinum–Taxane Chemotherapy
Authors: Chen Ping , Huhtinen Kaisa , Kaipio Katja , Mikkonen Piia , Aittomäki Viljami , Lindell Rony , Hynninen Johanna , Auranen Annika , Grénman Seija , Lehtonen Rainer , Carpén Olli , Hautaniemi Sampsa 
Published: April 2023

<p>Supplementary Figure S1. Outcome of PSFinder. Supplementary Figure S2. Kaplan-Meier survival curves. Supplementary Figure S3. Kaplan-Meier survival curves on time to progression in month. Supplementary Figure S4. Expression boxplot of validated transcript markers. Supplementary Figure S5. Promoter methylation changes. Supplementary Figure S6. Expression of genes affected by promoter hyper- and hypo- methylation. Supplementary Figure S7. DNMT3B expression. Supplementary Figure S8. Decitabine treatment result. Supplementary Figure S9. Kaplan-Meier survival curves on overall survival time. Tables Supplementary Table S1. PSFinder identified 61 transcripts at isoform-level for Poor I, Poor II and Good prognostic patient characterization. Supplementary Table S2. PSFinder identified 32 genes at gene-level for Poor I, Poor II and Good prognostic patient characterization. Supplementary Table S3. CpG loci with promoter hypermethylation (N=32) and hypomethylation (N=1) in Poor I patients. Supplementary Table S4. Primers and probes used in Taqman qRT-PCR. Supplementary Table S5. PSFinder identified subgroups and BRCA1/2 mutation status in patients from the TCGA discovery set. Supplementary Table S6. LPS predicted subgroups and BRCA1/2 mutation status in patients from the TCGA validation set.</p>
Figure S2 from An AIB1 Isoform Alters Enhancer Access and Enables Progression of Early-Stage Triple-Negative Breast Cancer
Authors: Sharif Ghada M. , Campbell Moray J. , Nasir Apsra , Sengupta Surojeet , Graham Garrett T. , Kushner Max H. , Kietzman William B. , Schmidt Marcel O. , Pearson Gray W. , Loudig Olivier , Fineberg Susan , Wellstein Anton , Riegel Anna T. 
Published: April 2023

<p>A)	Quantification of the number of Zebrafish embryos with DCIS or DCIS-Î"4-hy cells that have extravasated out of the blood vessels and into the neighboring tissue. p=0.57. B)	Quantification of the number of Zebrafish embryos with MCF10A, MCF10A-Î"4 or mixed cells that have extravasated out of the blood vessels and into the neighboring tissue. In the mixed cell population, only MCF10A parental line was fluorescently labeled and scored for extravasation. MCF10A and MCF10A-Î"4 are mixed at a 4:1 ratio. C)	Invasion assay of an endothelial monolayer (HUVEC) using ECIS. MCFDCIS cells were treated with conditioned media (CM) from MCFDCIS-Î"4 cells for 4 hours before added to the endothelial monolayer, and vice versa. No cells added to the endothelial monolayer as a negative control. D)	A schematic showing a three-chambered co-culture system. Top chamber has electrodes underneath a porous membrane to detect migrating cells. Middle chamber is only permeable to factors but not cells. Bottom chamber harbors cells that can crosstalk with migrating cells through secreted factors. E)	Real-time migration rate of MCFDCIS and MCFDCIS-Î"4 in co-culture chambers. F)	MCFDCIS and MCFDCIS-Î"4 cells were aggregated separately then embedded in 80% col I and 20% Matrigel together to monitor their crosstalk as separate spheres. Scale bar = 50Î¼m.</p>
Supplementary Table Set S11-S18 from Comprehensive Genomic Analysis Identifies Novel Subtypes and Targets of Triple-Negative Breast Cancer
Authors: Burstein Matthew D. , Tsimelzon Anna , Poage Graham M. , Covington Kyle R. , Contreras Alejandro , Fuqua Suzanne A.W. , Savage Michelle I , Osborne C. Kent , Hilsenbeck Susan G. , Chang Jenny C. , Mills Gordon B. , Lau Ching C. , Brown Powel H. 
Published: April 2023

<p>Table S11. 80 Gene Signature for NMF Cluster 1 (LAR). Table S12. 80 Gene Signature for NMF Cluster 2 (MES). Table S13. 80 Gene Signature for NMF Cluster 3 (BLIS). Table S14. 80 Gene Signature for NMF Cluster 4 (BLIA). Table S15. Assignment of Discovery Set Clusters by Discovery Set Centroids and Comparison to Discovery Set NMF. Table S16. Assignment of Validation Set Clusters by Discovery Set Centroids and Comparison to Validation Set NMF. Table S17.	Description of Publically Available Data Sets, with IHC Data for ER/PR/HER2, Downloaded from Gene Omnibus Employed in 'External Set'. Table S18. Assignment of External Set Clusters by Discovery Set Centroids</p>
Association of aneurysmatic subarachnoid hemorrhage rate with environmental changes or emotional bursts
Authors: Petridis Athanasios K. , Fischer Igor , Maslehaty Humajoun 
Published: April 2023

Abstract
Introduction
In the present letter we share the results of an analysis of more than 140,000 non traumatic arterial subarachnoid hemorrhages whereas the majority of them is expected to be after aneurysm rupture, in which we investigate a possible correlation of climatic changes and emotional bursts as correlating factors for such a rupture.

Methods
We obtained the daily number of SAH from 2006 to 2018 for males and females from the German National statistics agency. The ICD codes provided to us were I60.1-I60.7, which are SAHs originating from intracranial arteries and excluding traumatic SAH and other not specified SAH.

Results
An increase of mean SAH per day could be seen in winter compared to summer and family events seemed to have a protective effect against aneurysmal SAH. Additionally 6.55 more women per day suffer an SAH compared to men.

Conclusion
There is a statistical significant higher risk of aneurysm ruptures in winter and in females, and a statistical lower number in Mother’s day.
Poly-Universe Resource for Solving Geometric Tasks by Portuguese Basic Education Students
Authors: Matos Alexandre , Santos Vanda , B. Neto Teresa 
Published: April 2023

Abstract
This article presents the analysis and discussion of solving geometry tasks by Portuguese Basic Education students, using material from the Poly-UNiverse in Teacher Training Education (PUNTE) project. The teaching experience developed was aimed at testing and disseminating new resources, and innovative and transdisciplinary methodologies in the areas of Science, Technology, Engineering, Art and Mathematics (STEAM). The adopted methodology involved two phases. The first phase was exploratory, followed by a second phase where the exploration of geometry concepts in the plane (namely, the perimeter and the similarity of triangles) was carried out using the Poly-Universe material. The results of the study show that the Poly-Universe materials constituted an important teaching resource in solving the proposed tasks. Its manipulation allowed the visualisation of the situations involved in the tasks, as well as contributed to an implication in the activities developed by the students.