{"id":777,"date":"2026-02-10T19:11:58","date_gmt":"2026-02-10T19:11:58","guid":{"rendered":"https:\/\/urff.app\/?page_id=777"},"modified":"2026-09-26T09:42:12","modified_gmt":"2026-09-26T09:42:12","slug":"rechengeschichten","status":"publish","type":"page","link":"https:\/\/urff.app\/en\/rechengeschichten\/","title":{"rendered":"Math stories"},"content":{"rendered":"<div class=\"urff-appbox\" style=\"display:flex;flex-wrap:wrap;align-items:center;gap:1rem;padding:1rem 1.25rem;margin:1.5rem 0;border:1px solid rgba(0,0,0,.12);border-radius:18px;background:rgba(0,0,0,.035)\">\n<a href=\"https:\/\/apps.apple.com\/de\/app\/rechengeschichten\/id6758136534\" target=\"_blank\" rel=\"noopener\" style=\"flex:0 0 auto;line-height:0\"><img decoding=\"async\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/09\/appicon-rechengeschichten-6758136534.jpg\" alt=\"App-Icon Rechengeschichten\" width=\"96\" height=\"96\" loading=\"lazy\" style=\"width:96px;height:96px;border-radius:22%;box-shadow:0 1px 4px rgba(0,0,0,.15)\"><\/a>\n<div style=\"flex:1 1 12rem;min-width:0\">\n<div style=\"font-weight:700;font-size:1.15em;line-height:1.3\"><a href=\"https:\/\/apps.apple.com\/de\/app\/rechengeschichten\/id6758136534\" target=\"_blank\" rel=\"noopener\" style=\"text-decoration:none\">Math stories<\/a><\/div>\n<div style=\"font-size:.9em;opacity:.75;margin-top:.15em\">Christian Urff \u00b7 iPad<\/div>\n<\/div>\n<a href=\"https:\/\/apps.apple.com\/de\/app\/rechengeschichten\/id6758136534\" target=\"_blank\" rel=\"noopener\" style=\"flex:0 0 auto;display:inline-block;padding:.55em 1.1em;border-radius:999px;background:#0071e3;color:#fff;font-weight:600;font-size:.95em;text-decoration:none;white-space:nowrap\">Download from the App Store<\/a>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Sachaufgaben geh\u00f6ren zu den anspruchsvollsten Aufgaben im Mathematikunterricht. Kinder m\u00fcssen einen Text verstehen, relevante von irrelevanten Informationen unterscheiden, ein mathematisches Modell bilden und schlie\u00dflich rechnen. Viele scheitern dabei nicht an der Mathematik selbst, sondern bereits am Textverstehen oder an der Modellierung (Reusser 1997). Rechengeschichten ist eine App, die Kinder von Klasse 1 bis Klasse 6 und dar\u00fcber hinaus bei genau diesen Schritten KI-gest\u00fctzt begleitet: nicht durch Vorsagen von L\u00f6sungen, sondern durch strukturierte Impulse auf Basis erprobter L\u00f6sungsstrategien.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"790\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-1024x768.png\" alt=\"\" class=\"wp-image-790\" srcset=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-1024x768.png 1024w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-300x225.png 300w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-768x576.png 768w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-1536x1151.png 1536w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-2048x1535.png 2048w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-16x12.png 16w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"788\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot5-2-1024x768.png\" alt=\"\" class=\"wp-image-788\" srcset=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot5-2-1024x768.png 1024w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot5-2-300x225.png 300w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot5-2-768x576.png 768w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot5-2-1536x1151.png 1536w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot5-2-2048x1535.png 2048w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot5-2-16x12.png 16w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<h6 class=\"wp-block-heading\">Strategy-based work<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Acquiring explicit problem-solving strategies is significantly more effective for solving word problems than repeatedly practicing individual problems (Rasch 2001). Word problems offer seven ways to work with mathematical situations:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Read text<\/strong> \u2013 Reading aloud, word explanations and visually supported reading as an introduction to the task for children who need support in this area (e.g. also German as a Second Language, \u2026).<\/li>\n\n\n\n<li><strong>ask questions<\/strong> Children formulate their own questions about the situation and clarify any gaps in their understanding before they do the calculations.<\/li>\n\n\n\n<li><strong>Understanding the text<\/strong> \u2013 The app helps to create an information network: Which figures are relevant, what is the question, what is superfluous?<\/li>\n\n\n\n<li><strong>Developing solutions<\/strong> \u2013 Step-by-step guidance through the problem-solving process with tiered support.<\/li>\n\n\n\n<li><strong>Check solution<\/strong> \u2013 Metacognitive suggestions for evaluating the result: Is the result correct? Does it fit the situation?<\/li>\n\n\n\n<li><strong>Fault Detective<\/strong> \u2013 Analysis of deliberately flawed, predetermined solution paths. Examining others&#039; errors allows for objective discussion without personal threat and strengthens mathematical argumentation.<\/li>\n\n\n\n<li><strong>Making assumptions<\/strong> \u2013 For estimation and Fermi problems: Children learn to deal with missing information and to formulate reasoned assumptions.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"787\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot2-1-1024x768.png\" alt=\"\" class=\"wp-image-787\" srcset=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot2-1-1024x768.png 1024w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot2-1-300x225.png 300w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot2-1-768x576.png 768w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot2-1-1536x1151.png 1536w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot2-1-2048x1535.png 2048w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot2-1-16x12.png 16w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"789\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot1-1-1024x768.png\" alt=\"\" class=\"wp-image-789\" srcset=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot1-1-1024x768.png 1024w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot1-1-300x225.png 300w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot1-1-768x576.png 768w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot1-1-1536x1151.png 1536w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot1-1-2048x1535.png 2048w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot1-1-16x12.png 16w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<h6 class=\"wp-block-heading\">Task types<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Viele Kinder verrechnen reflexhaft alle vorkommenden Zahlen, ohne die Sachsituation wirklich zu durchdenken. Kapit\u00e4nsaufgaben \u2013 unl\u00f6sbare Aufgaben, bei denen genau diese Erkenntnis das Ziel ist \u2013 machen dieses Muster sichtbar und fordern Kinder auf, vor dem Rechnen innezuhalten. Fermi-Aufgaben stellen offene Fragen, die keine eindeutige L\u00f6sung haben, sondern begr\u00fcndetes Sch\u00e4tzen und Argumentieren verlangen. Beide Aufgabentypen sind in die App integriert, werden dort bewusst thematisiert und f\u00f6rdern ein tieferes Verst\u00e4ndnis mathematischer Modellierung. Bei der Generierung von Modellierungsaufgaben in der App k\u00f6nnen diese Aufgabentypen bewusst auch ausgew\u00e4hlt werden oder als Stichwort f\u00fcr die Generierung beispielsweise \u201e\u00fcberbestimmt\u201c oder \u201eunterbestimmt\u201c eingegeben werden.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Scaffolding and adaptivity<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">The support process follows Polya&#039;s four-phase model (understand, plan, implement, review) and utilizes the fading principle: Support begins with open-ended prompts and becomes more specific only as needed, progressing through strategic guidance and targeted assistance to step-by-step instructions. This allows children to work as close as possible to their zone of proximal development. The app adapts language, complexity, and intensity of support to the selected age group (grades 1 to 6).<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Accessibility and reading support<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">In a classroom, native German speakers sit next to children with German as a second language, strong readers next to children with reading difficulties. Those who don&#039;t understand the text can&#039;t grasp the underlying mathematics. Therefore, &quot;Math Stories&quot; offers a read-aloud function with adjustable speed, syllable division, and picture words based on ARASAAC pictograms, which visually support reading comprehension. This isn&#039;t about simplifying the task, but rather providing a fair approach to mathematics.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"790\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-1024x768.png\" alt=\"\" class=\"wp-image-790\" srcset=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-1024x768.png 1024w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-300x225.png 300w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-768x576.png 768w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-1536x1151.png 1536w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-2048x1535.png 2048w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot3-2-16x12.png 16w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"785\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot6-1-1024x768.png\" alt=\"\" class=\"wp-image-785\" srcset=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot6-1-1024x768.png 1024w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot6-1-300x225.png 300w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot6-1-768x576.png 768w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot6-1-1536x1151.png 1536w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot6-1-2048x1535.png 2048w, https:\/\/urff.app\/wp-content\/uploads\/2026\/02\/iPad-12.9-Inch-Display-Apple-iPad-Air-10.9-inch-4th-Generation-Screenshot6-1-16x12.png 16w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<h6 class=\"wp-block-heading\">Use in the classroom<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Rechengeschichten eignet sich besonders f\u00fcr Unterrichtssettings, in denen Kinder selbstst\u00e4ndig arbeiten, auch f\u00fcr Kinder, die zu Hause keine fachliche Unterst\u00fctzung erhalten. Die Begleitung ersetzt keine Lehrkraft, kann sie aber im mikrodidaktischen Bereich gut erg\u00e4nzen, also w\u00e4hrend der Aufgabenbearbeitung, wenn Kinder sonst keine Unterst\u00fctzung bekommen und resignieren k\u00f6nnten. Aufgaben k\u00f6nnen per Texteingabe, Foto oder QR-Code eingegeben und zwischen Ger\u00e4ten geteilt werden, was die Integration in bestehende Unterrichtsabl\u00e4ufe erleichtert. <strong>Any text-based task can therefore be completed with the app.<\/strong>, of course also in combination with paper and pencil.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Additional functions<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">A problem generator creates word problems categorized by topic, operation, and difficulty level. Additionally, there is a collection of real-world scenarios for each grade level and difficulty level that can be used.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Children can create sketches on a drawing surface to illustrate the task and visualize their ideas about the situation. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00fcr abgeschlossene Aufgaben lassen sich Kompetenz-Urkunden erstellen, die den Bearbeitungsprozess w\u00fcrdigen \u2013 nicht die Richtigkeit der L\u00f6sung. Die Urkunden geben Lehrkr\u00e4ften zudem wertvolle Hinweise auf die Qualit\u00e4t der Aufgabenbearbeitung und \u00fcber die Kompetenzentwicklung der Kinder.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Rechengeschichten App \u2013 Sachaufgaben verstehen\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/nGHLnG9MBnc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h6 class=\"wp-block-heading\">Availability<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Rechengeschichten ist als Webapp unter <a href=\"https:\/\/rechengeschichten.urff.app\">math stories.urff.app<\/a> frei zug\u00e4nglich und funktioniert auf allen Ger\u00e4ten mit einem aktuellen Browser. Allerdings muss hier ein eigener API-Schl\u00fcssel f\u00fcr KI eingegeben werden, um die KI-Funktionen der App zu nutzen. Die App ist Open Educational Ressource und kann gerne weiterentwickelt werden. Der Quellcode steht auf Github zur Verf\u00fcgung und kann gepr\u00fcft und weiterentwickelt werden.<br><strong>F\u00fcr iPad und iPhone steht eine App im App Store bereit, bei der mit dem Kaufpreis auch die KI-Kosten gedeckt sind, sodass kein eigener API-Schl\u00fcssel mit Extrakosten notwendig ist.<\/strong><\/p>\n\n\n\n<div class=\"urff-appbox\" style=\"display:flex;flex-wrap:wrap;align-items:center;gap:1rem;padding:1rem 1.25rem;margin:1.5rem 0;border:1px solid rgba(0,0,0,.12);border-radius:18px;background:rgba(0,0,0,.035)\">\n<a href=\"https:\/\/apps.apple.com\/de\/app\/rechengeschichten\/id6758136534\" target=\"_blank\" rel=\"noopener\" style=\"flex:0 0 auto;line-height:0\"><img decoding=\"async\" src=\"https:\/\/urff.app\/wp-content\/uploads\/2026\/09\/appicon-rechengeschichten-6758136534.jpg\" alt=\"App-Icon Rechengeschichten\" width=\"96\" height=\"96\" loading=\"lazy\" style=\"width:96px;height:96px;border-radius:22%;box-shadow:0 1px 4px rgba(0,0,0,.15)\"><\/a>\n<div style=\"flex:1 1 12rem;min-width:0\">\n<div style=\"font-weight:700;font-size:1.15em;line-height:1.3\"><a href=\"https:\/\/apps.apple.com\/de\/app\/rechengeschichten\/id6758136534\" target=\"_blank\" rel=\"noopener\" style=\"text-decoration:none\">Math stories<\/a><\/div>\n<div style=\"font-size:.9em;opacity:.75;margin-top:.15em\">Christian Urff \u00b7 iPad<\/div>\n<\/div>\n<a href=\"https:\/\/apps.apple.com\/de\/app\/rechengeschichten\/id6758136534\" target=\"_blank\" rel=\"noopener\" style=\"flex:0 0 auto;display:inline-block;padding:.55em 1.1em;border-radius:999px;background:#0071e3;color:#fff;font-weight:600;font-size:.95em;text-decoration:none;white-space:nowrap\">Download from the App Store<\/a>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">literature<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Franke, M., &amp; Ruwisch, S. (2010). Didaktik des Sachrechnens in der Grundschule (2. Aufl.). Heidelberg: Spektrum Akademischer Verlag.<\/li>\n\n\n\n<li>Rasch, R. (2001). Working with challenging word problems in primary school mathematics lessons: A study of primary school children&#039;s approaches to demanding word problems and conclusions for lesson design that promotes corresponding problem-solving skills. Hildesheim: Franzbecker.<\/li>\n\n\n\n<li>Reusser, K. (1997). Acquisition of mathematical skills: Literature review. In F.E. Weinert &amp; A. Helmke (Eds.), Development in primary school age (pp. 141\u2013155). Weinheim: Beltz PsychologieVerlagsUnion (PVU).<\/li>\n\n\n\n<li>PIKAS (DZLM). <em>Factual situations \u2013 sizes and measurements.<\/em> <a href=\"https:\/\/pikas.dzlm.de\/unterricht\/gr\u00f6\u00dfen-und-messen\/sachsituationen\">pikas.dzlm.de<\/a>.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Rechengeschichten Christian Urff \u00b7 iPad Im App Store laden Sachaufgaben geh\u00f6ren zu den anspruchsvollsten Aufgaben im Mathematikunterricht. Kinder m\u00fcssen einen Text verstehen, relevante von irrelevanten Informationen unterscheiden, ein mathematisches Modell bilden und schlie\u00dflich rechnen. Viele scheitern dabei nicht an der Mathematik selbst, sondern bereits am Textverstehen oder an der Modellierung (Reusser 1997). Rechengeschichten ist eine [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-777","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/pages\/777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/comments?post=777"}],"version-history":[{"count":21,"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/pages\/777\/revisions"}],"predecessor-version":[{"id":1453,"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/pages\/777\/revisions\/1453"}],"wp:attachment":[{"href":"https:\/\/urff.app\/en\/wp-json\/wp\/v2\/media?parent=777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}