{"rewrite":{"id":"r_29a64b51b7126f7b1f78c265","clusterId":"c_dbeb22933723869ac0310fbf","slug":"ai-tutor-knock-adds-red-ink-correction-for-handwritten-math-answers","model":"deepseek-v4-flash","headline":"AI Tutor Knock Adds Red-Ink Correction for Handwritten Math Answers","summary":"Hanji Co. has added a red-ink correction feature to its AI tutor Knock. Students photograph handwritten answers and receive visual red-ink markings on the image, identifying errors and providing advice within tens of seconds. The feature supports up to university entrance exam level. It was developed by analyzing hundreds of student answers and consulting teachers to replicate the familiar teacher correction experience.","whyItMatters":"The feature moves AI tutoring from text-based feedback to a visual correction format that mimics traditional teacher grading, aiming to improve learning motivation and reduce teacher workload.","webCardHtml":"\u003cp\u003eKnock previously offered text-based correction, but student interviews showed that screen readability and comfort directly affect learning motivation. The new red-ink feature lets students upload a photo of their handwritten answer and receive visual markings on the image, identifying errors and providing advice within tens of seconds. It supports advanced descriptive answers at the university entrance exam level. The development team reviewed hundreds of actual high school student answers and held discussions with teachers to build a database of common stumbling points and teacher-specific grading patterns. Hanji also plans to expand the feature to track class-level learning trends from correction data.\u003c/p\u003e","blueskyPost":"AI tutor Knock now corrects handwritten math answers with red-ink markings. Students photograph their work and get visual feedback in tens of seconds, supporting up to university entrance exam level. The feature was built by analyzing hundreds of student answers and consulting teachers.","twitterPost":"AI tutor Knock adds red-ink correction for handwritten math answers. Students upload a photo and get visual markings in tens of seconds. Supports up to university entrance exam level. Built from hundreds of student answers and teacher input.","threadsPost":null,"newsletterBlurb":"Hanji Co. has added a red-ink correction feature to its AI tutor Knock, allowing students to photograph handwritten answers and receive visual red-ink markings with feedback in tens of seconds. The feature supports up to university entrance exam level and was developed by analyzing hundreds of student answers and consulting teachers. Hanji plans to expand the feature to track class-level learning trends.","attributionJson":"[{\"source\":\"ASCII.jp\",\"url\":\"https://ascii.jp/elem/000/004/413/4413025/?rss\",\"title\":\"AI Tutor 'Knock' Adds Red-Ink Correction Feature for Math\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4114,"outputTokens":1844,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1782268349,"createdAt":"2026-06-24T02:23:02.000Z","publishedAt":"2026-06-24T02:25:24.000Z","updatedAt":"2026-06-24T02:25:24.000Z"},"cluster":{"id":"c_dbeb22933723869ac0310fbf","canonicalTitle":"AIチューター「Knock」に数学の赤入れ添削機能を追加","representativeArticleId":"a_fad2da17abd948180b80fdc3","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Knock\"],\"studios\":[],\"people\":[],\"type\":\"announcement\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-06-23T23:31:23.000Z","lastSeenAt":"2026-06-23T23:31:23.000Z","updatedAt":"2026-06-24T02:25:24.000Z"},"attribution":[{"source":"ASCII.jp","url":"https://ascii.jp/elem/000/004/413/4413025/?rss","title":"AIチューター「Knock」に数学の赤入れ添削機能を追加"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Knock"],"studios":[],"people":[],"type":"announcement","domain":"other","is_roundup":false},"keyFacts":["Hanji Co. added a red-ink correction feature to its AI tutor Knock that lets students photograph handwritten answers and receive visual markings identifying errors within tens of seconds.","The feature supports advanced descriptive answers up to the university entrance exam level.","The development team analyzed hundreds of actual high school student answers and consulted teachers to build a database of common stumbling points and grading patterns.","Hanji plans to expand the feature to track class-level learning trends from correction data."]}