diff --git a/3.0 pages rollcall.js b/3.0 pages rollcall.js
new file mode 100644
index 0000000..a1a9f90
--- /dev/null
+++ b/3.0 pages rollcall.js	
@@ -0,0 +1,208 @@
+const db = wx.cloud.database();
+const app = getApp();
+
+Page({
+  data: {
+    students: [],
+    selectedStudent: null,
+    score: '',
+    questionRepeatedCorrectly: false,
+    additionalScore: 0,
+    doublePoints: false,
+    updatedScore: null
+  },
+
+  onLoad: function() {
+    this.getStudents();
+  },
+
+  // 获取学生列表
+  getStudents: function() {
+    const MAX_LIMIT = 20;
+    db.collection('students').count().then(res => {
+      const total = res.total;
+      const batchTimes = Math.ceil(total / MAX_LIMIT);
+      const tasks = [];
+      for (let i = 0; i < batchTimes; i++) {
+        const promise = db.collection('students').skip(i * MAX_LIMIT).limit(MAX_LIMIT).get();
+        tasks.push(promise);
+      }
+      Promise.all(tasks).then(results => {
+        const students = results.reduce((acc, cur) => {
+          return acc.concat(cur.data);
+        }, []);
+        this.setData({
+          students: students
+        });
+        app.globalData.students = students;
+        console.log('Students retrieved:', students);
+      }).catch(err => {
+        console.error('Failed to get students:', err);
+        wx.showToast({
+          title: '获取学生信息失败',
+          icon: 'none'
+        });
+      });
+    }).catch(err => {
+      console.error('Failed to count students:', err);
+      wx.showToast({
+        title: '获取学生数量失败',
+        icon: 'none'
+      });
+    });
+  },
+
+  // 随机点名
+  randomRollCall: function() {
+    const students = this.data.students;
+    if (students.length === 0) {
+      wx.showToast({
+        title: '没有学生信息',
+        icon: 'none'
+      });
+      return;
+    }
+
+    const totalPoints = students.reduce((sum, student) => sum + Math.max(0, 10 - student.points), 0);
+    let randomPoint = Math.random() * totalPoints;
+    let cumulativePoint = 0;
+
+    let selectedStudent = null;
+    for (const student of students) {
+      cumulativePoint += Math.max(0, 10 - student.points);
+      if (randomPoint <= cumulativePoint) {
+        selectedStudent = student;
+        break;
+      }
+    }
+
+    if (selectedStudent) {
+      this.setData({
+        selectedStudent: selectedStudent
+      });
+      wx.showModal({
+        title: '点名成功',
+        content: `点到的同学是：${selectedStudent.name} (${selectedStudent.id})`,
+        showCancel: false
+      });
+
+      // 触发双倍积分事件
+      this.triggerDoublePointsEvent(selectedStudent);
+
+      // 初始积分更新：到达课堂 +1 分
+      this.updateInitialPoints(1); 
+    } else {
+      wx.showToast({
+        title: '点名失败',
+        icon: 'none'
+      });
+    }
+  },
+
+  // 触发双倍积分事件
+  triggerDoublePointsEvent: function(student) {
+    const probability = 0.1; // 10%的概率触发双倍积分
+    if (Math.random() < probability) {
+      this.setData({
+        doublePoints: true
+      });
+      wx.showToast({
+        title: '双倍积分！',
+        icon: 'success'
+      });
+    } else {
+      this.setData({
+        doublePoints: false
+      });
+    }
+  },
+
+  // 输入评分
+  inputScore: function(e) {
+    this.setData({
+      additionalScore: parseFloat(e.detail.value)
+    });
+  },
+
+  // 初始积分更新函数
+  updateInitialPoints: function(baseScore) {
+    const student = this.data.selectedStudent;
+    student.points += baseScore;
+    this.saveStudentPoints(student);
+  },
+
+  // 更新积分
+  updatePoints: function() {
+    const student = this.data.selectedStudent;
+    let score = 1; // 基础到达课堂积分+1
+    console.log(`Initial score: ${score}`);
+    
+    // 判断是否能准确重复所提问的问题
+    if (this.data.questionRepeatedCorrectly) {
+      score += 0.5;
+      console.log('Accurate repetition: +0.5');
+      // 如果准确回答问题，输入要加的分数
+      score += this.data.additionalScore;
+      console.log(`Accurate answer score: +${this.data.additionalScore}`);//调试
+    } else {
+      score -= 1;
+      console.log('Inaccurate repetition: -1');//调试
+    }
+
+    console.log(`Score before double points: ${score}`);//调试
+    // 如果触发双倍积分事件，积分加倍
+    if (this.data.doublePoints) {
+      score *= 2;
+      console.log('Double points applied');
+    }
+
+    console.log(`Final computed score: ${score}`);
+    student.points += score;
+    this.setData({ updatedScore: student.points });
+    this.saveStudentPoints(student);
+  },
+
+  // 学生未到
+  studentAbsent: function() {
+    const student = this.data.selectedStudent;
+    let score = -1; // 学生未到，扣1分
+
+    student.points += score;
+    this.setData({ updatedScore: student.points });
+    this.saveStudentPoints(student);
+  },
+
+  // 保存学生积分
+  saveStudentPoints: function(student) {
+    db.collection('students').doc(student._id).update({
+      data: {
+        points: student.points
+      }
+    }).then(() => {
+      this.getStudents();
+      wx.showToast({
+        title: '积分更新成功',
+        icon: 'success'
+      });
+    }).catch(err => {
+      console.error('Failed to update student points:', err);
+      wx.showToast({
+        title: '积分更新失败',
+        icon: 'none'
+      });
+    });
+  },
+
+  // 设置回答问题的情况
+  setQuestionRepeatedCorrectlyTrue: function() {
+    this.setData({
+      questionRepeatedCorrectly: true
+    });
+  },
+
+  setQuestionRepeatedCorrectlyFalse: function() {
+    this.setData({
+      questionRepeatedCorrectly: false
+    });
+  }
+});