{"id":12434,"date":"2026-11-02T14:49:41","date_gmt":"2026-11-02T13:49:41","guid":{"rendered":"https:\/\/splotstudio.pl\/?p=12434"},"modified":"2026-11-02T14:49:41","modified_gmt":"2026-11-02T13:49:41","slug":"duffspin-for-gcse-maths-turning-one-wrong-answer-into-a-five-minute-lesson","status":"publish","type":"post","link":"https:\/\/splotstudio.pl\/index.php\/2026\/11\/02\/duffspin-for-gcse-maths-turning-one-wrong-answer-into-a-five-minute-lesson\/","title":{"rendered":"Duffspin for GCSE Maths: Turning One Wrong Answer Into a Five-Minute Lesson"},"content":{"rendered":"

Maya had just got her maths mock back: 62%, with a neat red cross beside a quadratic equation. She copied the correct working into her notebook, felt better, and made the same sign error two weeks later. The problem was not effort. The cause was that she reviewed the answer, not the moment her reasoning went wrong. The solution is a small routine she now uses, called duffspin<\/a>: one wrong question, five minutes, three written prompts.<\/p>\n

The problem with re-copying model answers<\/h2>\n

Re-copying a model answer feels productive because the page looks tidy. But it trains recognition: the solution looks familiar, so the student assumes they can reproduce it. A concrete example is expanding (x – 3)(x + 5)<\/em> and writing -15x<\/em> instead of -15<\/em>. The student re-copies the correct answer but never identifies why -15x<\/em> felt right. The takeaway is that error review must target the faulty rule, not the final answer.<\/p>\n

What duffspin asks you to do<\/h2>\n

Duffspin is a structured error review, not a revision game. It uses three prompts: What exactly did I do? What made that step look correct at the time? Which rule would have caught it? The routine works because each prompt forces the student to move from recognising a correction to explaining the reasoning behind it.<\/p>\n

The five-minute routine<\/h2>\n
    \n
  1. Pick one wrong answer from the mock, not the whole paper. Choose a question where you lost more than one mark or repeated a previous error.<\/li>\n
  2. Write the exact line where the working stopped being true. For Maya, that was -3 \u00d7 5 = -15x<\/em>.<\/li>\n
  3. Name the false assumption in plain words: \u201cI add an x whenever I multiply a negative and a positive.\u201d<\/li>\n
  4. Write the correct rule as a sentence you could say aloud: \u201cThe product of two numbers is a number; the x only appears if an x is multiplied.\u201d<\/li>\n
  5. Redo one near-identical question immediately, then again after 48 hours.<\/li>\n<\/ol>\n

    The timer matters. Five minutes forces a narrow focus; 25 minutes invites copying. One question per session is enough, and three sessions a week produce 15 minutes of error review without crowding out new practice.<\/p>\n

    Why it beats highlighting and re-reading<\/h2>\n

    Highlighting feels efficient because it is fast and visually clear, but it leaves the student in recognition mode. Duffspin forces retrieval: the learner has to reconstruct the faulty step and state the rule in their own words. That is why it transfers to exams. A student who can explain why -15x<\/em> was wrong is less likely to repeat the error under time pressure than a student who has only seen the correction.<\/p>\n

    Three common mistakes<\/h2>\n
      \n
    • Reviewing every wrong answer.<\/strong> Fix: choose one high-value error per subject. More than that turns a five-minute routine into a discouraging backlog.<\/li>\n
    • Writing \u201ccareless mistake.\u201d<\/strong> Fix: name the precise false step. \u201cCareless\u201d hides the rule that needs repair.<\/li>\n
    • Skipping the re-test.<\/strong> Fix: schedule the near-identical question for 48 hours later. Without retrieval, the insight fades.<\/li>\n<\/ul>\n

      After the next mock, Maya will not re-copy the whole paper. She will pick three questions, run the duffspin prompts on each, and diarise three short re-tests. The result is a smaller, sharper revision log: not \u201cI got that wrong\u201d, but \u201cI believed a negative times a positive always gained an x, and now I know why it does not.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

      Maya had just got her maths mock back: 62%, with a neat red cross beside a quadratic equation. She copied the correct working into her notebook, felt better, and made the same sign error two weeks later. The problem was not effort. The cause was that she reviewed the answer, not the moment her reasoning […]<\/p>\n","protected":false},"author":121,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12434","post","type-post","status-publish","format-standard","hentry","category-uncategorized","entry"],"_links":{"self":[{"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/posts\/12434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/users\/121"}],"replies":[{"embeddable":true,"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/comments?post=12434"}],"version-history":[{"count":1,"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/posts\/12434\/revisions"}],"predecessor-version":[{"id":12435,"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/posts\/12434\/revisions\/12435"}],"wp:attachment":[{"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/media?parent=12434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/categories?post=12434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/splotstudio.pl\/index.php\/wp-json\/wp\/v2\/tags?post=12434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}