During a school-to-life（语境补充词）/school-to-life/ research task, Leo's group received a case with records from several years and places. The first evidence board connected grandparent（祖父母；外祖父母）/ˈgrændˌpɛrənt/, grandson（孙子；外孙）/ˈgrændˌsən/, handbag（手提包）/ˈhændˌbæg/, harmful（有害的）/'hɑ:mful/, headache（头痛）/ˈhɛˌdeɪk/, humorous（幽默的）/ˈhjumərəs/, hundred（一百）/ˈhənərd/, ice-cream（冰激凌）/ˈaɪˌskrim/, india（印度）/ˈɪndiə/, indian（印度的；印度人）/ˈɪndiən/, introduction（介绍；引言）/ˌɪntrəˈdəkʃən/, invention（编造；发明）/ˌɪnˈvɛnʃən/, january（一月）/ˈʤænjuˌɛri/, and japan（日本）/ʤəˈpæn/. Each item had a date, source, or witness, so the students could check why it mattered. The team has already reviewed the complete plan.
A second（第二）/ˈsekəndz/ folder added japanese（日本的；日语）/ˌʤæpəˈniz/, july（七月）/ˌʤuˈlaɪ/, june（六月）/ʤun/, leader（领导者）/ˈliːdə/, london（伦敦）/ˈləndən/, lucky（幸运的）/ˈləki/, manager（经理；管理者）/ˈmænɪdʒə/, missing（失踪的；缺少的）/'misiŋ/, mobile phone（手机）/ˈmoʊbəl foʊn/, monday（星期一）/ˈmʌndeɪ/, musician（音乐家）/mju:'ziʃәn/, national（国家的；民族的）/ˈnæʃənəl/, natural（自然的）/ˈnæʧərəl/, and nine（九）/naɪn/. The entries did not all support the same explanation. The group separated direct facts from comments, compared the order of events, and marked information that still needed confirmation（证实、证明）/.kɒnfә'meiʃәn/. The final choice was explained to everyone at the meeting.
The most difficult board included nineteen（十九）/ˈnaɪnˈtin/, ninety（九十）/ˈnaɪnti/, ninth（第九）/naɪnθ/, noisy（吵闹的）/'nɒizi/, northern（北方的）/ˈnɔrðərn/, november（十一月）/noʊˈvɛmbər/, october（十月）/ɑkˈtoʊbər/, olympics（奥林匹克运动会）/әu'limpiks/, one（一）/wən/, pacific（太平洋的；太平洋）/pəˈsɪfɪk/, player（运动员；播放器）/ˈpleɪə/, pollution（污染）/pә'lu:ʃәn/, pronunciation（发音）/prəˌnənsiˈeɪʃən/, and pupil（学生；瞳孔）/ˈpjupəl/. Some details looked familiar but carried a different meaning in this case. Mina, who led（lead的过去式和过去分词）/led/ the discussion, asked for clear evidence. The supervisor（管理者、监督者）/.sju:pә'vaizә/ replied, “A useful answer must explain the awkward clue as well as the easy one.”
The final set brought together rainy（多雨的）/ˈreɪni/, recently（最近）/ˈrisəntli/, russia（俄罗斯）/ˈrəʃə/, russian（俄罗斯的；俄语）/ˈrəʃən/, saturday（星期六）/ˈsætədeɪ/, second, secretary（秘书）/ˈsɛkrəˌtɛri/, september（九月）/sɛpˈtɛmbər/, seven（七）/ˈsɛvən/, seventeen（十七）/ˈsɛvənˈtin/, seventh（第七）/ˈsɛvənθ/, seventy（七十）/ˈsɛvənti/, silence（安静；沉默）/ˈsaɪləns/, and six（六）/sɪks/. The students checked every label, removed two repeated claims, and wrote（写下）/roʊt/ a reason beside each change. If the first method fails, we can try another one. This rule let them correct the record without hiding uncertainty（不确定、不可靠）/.ʌn'sә:tnti/ or blaming a teammate（队友）/'ti:mmeit/.
They planned to check in（办理登记手续）/ʧɛk ɪn/, check out（办理退房；结账离开）/ʧɛk aʊt/, and set off（出发）/sɛt ɔf/ at safe times. Nobody would go on board（在交通工具上）/ɔn bɔrd/ without checking the notice in advance（提前）/ɪn ədˈvæns/. In case of（万一；如果发生）/ɪn keɪs əv/ trouble, one adult would be responsible for（对……负责）/bi riˈspɑnsəbəl fər/ contact while the student could apply for（申请）/əˈplaɪ fər/ official help. The finished report turned a crowded collection into a clear decision. It showed which evidence was strong, which detail needed further checking, and what action should happen next. The group could defend its result because every important word appeared in a real, checkable（语境补充词）/checkable/ context.