diff --git a/gui/main.js b/gui/main.js
index 79e990e..ba3a432 100644
--- a/gui/main.js
+++ b/gui/main.js
@@ -33,7 +33,23 @@ document.addEventListener("DOMContentLoaded", function () {
                 var questions_html = "<form id='form' onkeydown='return event.keyCode != 13;'>"
                 questions.forEach(q => {
                     // console.log(q)
-                    if (q.options) {
+                    if (q.is_multiple) {
+                        let options_div = ""
+                        q.options.forEach(o => {
+                            options_div += `<label for="${o}${q.id}"><input type="checkbox" id="${o}${q.id}" name="${q.id}" value="${o}">${o}</label>`
+                        })
+                        const question_div = 
+                        `<fieldset>
+                            <legend>Выберите ответ:</legend>
+                            ${options_div}
+                        </fieldset>`
+                        questions_html += 
+                        `<article>
+                            <h3>${q.question}</h3>
+                            ${q.picture ? `<img src='${q.picture}'>` : ""}
+                            ${question_div}
+                        </article>`
+                    } else if (q.options) {
                         let options_div = ""
                         q.options.forEach(o => {
                             options_div += `<label for="${o}${q.id}"><input type="radio" id="${o}${q.id}" name="${q.id}" value="${o}">${o}</label>`
@@ -71,7 +87,7 @@ document.addEventListener("DOMContentLoaded", function () {
                     // TODO: move this logic to the backend check_answers function
                     // Populate quiz with empty answers (if no answer presented in select there'll be no property "answer" what could not be resolved in API)
                     for (const question of quiz.questions) {
-                        question.student_answer = ""
+                        question.is_multiple ? question.student_answer = [] : question.student_answer = ""
                     }
 
                     // Replace the empty answers with real answers
@@ -79,10 +95,12 @@ document.addEventListener("DOMContentLoaded", function () {
                     const formData = new FormData(form);
                     for (const [key, value] of formData) {
                         // console.log(quiz)
-                        // console.log(`${key}: ${value}\n`)  // assume questions are in the same order - can it make code simplier?
-                        quiz.questions.find(q => q.id == key).student_answer = value
-                        // console.log(quiz)
+                        console.log(`${key}: ${value}\n`)  // assume questions are in the same order - can it make code simplier?
+                        const question = quiz.questions.find(q => q.id == key)
+                        question.is_multiple ? question.student_answer.push(value) : question.student_answer = value
+                        // quiz.questions.find(q => q.id == key).student_answer = value
                     }
+                    console.log(quiz)
                     fetch('http://localhost:8000/save_student_answers', {
                         method: 'POST',
                         // mode: 'no-cors',
diff --git a/main.py b/main.py
index 7f021c4..5c725a7 100644
--- a/main.py
+++ b/main.py
@@ -30,8 +30,10 @@ with open(QUESTIONS_FILE, "r", encoding="UTF-8") as f:
     # if you want to use topics 1) filter all questions with topics 2) use topic questions to construct quiz_questions (when removing service keys from all_questions dict)
     # topics = ["теодолит"]  # move topics to VARIABLES
     # topics_questions = [q for q in all_questions if q.get("topic") in topics]
+    typed_questions = [dict(q, **{"is_multiple": True}) if type(q["answer"]) is list else dict(q, **{"is_multiple": False}) for q in all_questions]
+    print(typed_questions)
     remove_keys = ["author", "answer", "topic"]
-    quiz_questions = [{key: value for key, value in q.items() if key not in remove_keys} for q in all_questions]  # all_questions can be replaced with topic_questions
+    quiz_questions = [{key: value for key, value in q.items() if key not in remove_keys} for q in typed_questions]  # all_questions can be replaced with topic_questions
 
 with open(STUDENTS_FILE, "r", encoding="UTF-8") as f:
     content = json.load(f)
@@ -46,7 +48,13 @@ def check_answers(student_answers: dict):
     for a in checked_answers["questions"]:
         question_id = a["id"]
         a["correct_answer"] = next(question["answer"] for question in all_questions if question["id"] == question_id)  # all_questions can be replaced with topic_questions
-        a["is_correct"] = a["student_answer"].casefold() == a["correct_answer"].casefold()  # make sure answer is str
+        if type(a["student_answer"]) is str and type(a["correct_answer"]) is str:
+            a["is_correct"] = a["student_answer"].casefold() == a["correct_answer"].casefold()
+        elif type(a["student_answer"]) is list and type(a["correct_answer"]) is list:
+            a["is_correct"] = set(a["student_answer"]) == set(a["correct_answer"])
+        else:
+            print("Unmatched types! Can't compare.")
+            a["is_correct"] = False
 
     checked_answers["correct"] = sum([a["is_correct"] for a in checked_answers["questions"]])
     checked_answers["correct_percent"] = round(checked_answers["correct"] * 100 / len(checked_answers["questions"]))
diff --git a/questions.json b/questions.json
index c3a1f4c..61d3acd 100644
--- a/questions.json
+++ b/questions.json
@@ -48,6 +48,22 @@
                 "Прибор для измерения высот"
             ],
             "answer": "Прибор для измерения углов"
+        },
+        {
+            "id": 6,
+            "topic": "нивелир",
+            "author": "GT",
+            "question": "Что такое нивелир 2.0?",
+            "options": [
+                "Прибор для измерения земли",
+                "Прибор для измерения углов",
+                "Прибор для измерения расстояний",
+                "Прибор для измерения высот"
+            ],
+            "answer": [
+                "Прибор для измерения расстояний",
+                "Прибор для измерения углов"
+            ]
         }
     ]
 }
\ No newline at end of file