diff --git a/demo/correct-question.py b/demo/correct-question.py
old mode 100644
new mode 100755
index c5ff284..03933e7
--- a/demo/correct-question.py
+++ b/demo/correct-question.py
@@ -1,6 +1,8 @@
 #!/usr/bin/env python3.4
 
+import re
 import sys
+
 s = sys.stdin.read()
 
 # set of words converted to lowercase lowercase
diff --git a/demo/questions.yaml b/demo/questions.yaml
index e760d87..83e835d 100644
--- a/demo/questions.yaml
+++ b/demo/questions.yaml
@@ -1,52 +1,54 @@
 -
-    ref: solar-system-mars
+    ref: solar-system-jupiter
     type: radio
-    text: Choose the correct answer
+    text: Which one is the largest planet?
     options:
-        - This one is correct
-        - Wrong
-        - Very wrong!
-    # optional
+        - Jupiter
+        - Mercury
+        - Mars
+    # optional, default is 0, True, True
     correct: 0
     shuffle: True
     discount: True
     hint: Just don't choose the wrong ones
 # ---------------------------------------------------------------------------
 -
-    ref: solar-system-jupiter
+    ref: solar-system-mars
     type: checkbox
     text: Which ones are correct?
     options:
-        - Yes
-        - No
-        - Yes
-        - Obvious one, not very important
+        - $1 > 0$
+        - $-1 > 1$
+        - $\sqrt{3} > \sqrt{2}$
+        - $0 = 0$
     correct: [1, -1, 1, 0.5]
+    # optional
+    discount: True
     hint:  There are three.
 # ---------------------------------------------------------------------------
 -
-    ref: solar-system-venus
+    ref: question-v1
     type: text
     text: What's your favorite basic color?
     correct: ['blue', 'green']
     hint: It's not red.
 # ---------------------------------------------------------------------------
 -
-    ref: question-v1
+    ref: question-v2
     type: text_regex
-    text: What's your favorite basic color?
+    text: What's my favorite basic color?
     correct: '[bB]lue'
     hint: It's not red.
 # ---------------------------------------------------------------------------
 -
-    ref: question-v2
+    ref: question-colors
     type: textarea
     text: Write names of the three basic colors.
     correct: demo/correct-question.py
     hint: They start by RGB and order does not matter.
 # ---------------------------------------------------------------------------
 -
-    ref: question-v3
+    ref: question-whatever
     type: generator
     script: demo/generate-question.py
     # the script should print a question in yaml format like the ones above.
diff --git a/demo/test.yaml b/demo/test.yaml
index a5e61ac..fe75d6d 100644
--- a/demo/test.yaml
+++ b/demo/test.yaml
@@ -39,18 +39,24 @@ questions:
         # choose 1 from the following 3 questions
         - solar-system-mars
         - solar-system-jupiter
-        - solar-system-venus
       points: 0.5
 
     # second
     - ref:
         - question-v1
         - question-v2
-        - question-v3
         # points: 1.0 is the default, if not defined here.
 
-    # third
+    # 3.
+    - ref:
+        - question-colors
+
+    # 4.
+    - ref:
+        - question-whatever
+
+    # 5.
     - ref: one-question
 
-    # fourth
+    # 6.
     - another-question
diff --git a/questions.py b/questions.py
index f920323..1cc40d4 100644
--- a/questions.py
+++ b/questions.py
@@ -390,7 +390,7 @@ class QuestionTextArea(Question):
                 self['grade'] = float(value)
             except (ValueError):
                 self['grade'] = 0.0
-                raise Exception('Correction of question "%s" returned nonfloat.' % self['ref'])
+                raise Exception('Correction of question "{0}" returned nonfloat "{1}".'.format(self['ref'], value))
 
         return self['grade']
 
diff --git a/templates/test.html b/templates/test.html
index e90130c..8e8b2b9 100644
--- a/templates/test.html
+++ b/templates/test.html
@@ -178,9 +178,9 @@
                                         </div>
                                     % endfor
                                 % elif q['type'] in ('text', 'text_regex'):
-                                    <input type="text" name="${q['ref']}" class="form-control">
+                                    <input type="text" name="${q['ref']}" class="form-control" value="${q['answer'] if q['answer'] is not None else ''}">
                                 % elif q['type'] == 'textarea':
-                                    <textarea class="form-control" rows="8" name="${q['ref']}"></textarea>
+                                    <textarea class="form-control" rows="8" name="${q['ref']}">${q['answer'] if q['answer'] is not None else ''}</textarea>
                                 % endif
                             </fieldset>
 
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libgit2 0.21.2